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I was just stumbling over this talk page on recent changes and remembering all the fun we had with Mr. Metric Time, and I realized that this page is a total mess and utterly confusing to anyone who has not been there during the discussions. Now that Mr Voorman has left (for good, hopefully :P) and won't be clearing the page anymore, would it be appropriate to at least sort the old discussions chronologically? I know that editing other people's comments on talk pages is a big no-no, that's why I don't just go ahead and do it, but i think that sorting the discussions might really benefit this page. -- Ferkelparade π 00:21, 22 Sep 2004 (UTC)
I think refactoring would be fine, as long as you dont lose content or context: in fact, your right in saying we would get more context if you refactored. I would do it myself, only I still shuder whenever these pages appear on my watchlist, and so I dont think I can be sufficently neutral! Iain 08:37, 22 Sep 2004 (UTC)
A Google search reveals that Andre Fischer is famous as "a member from the Decimal Time forum." There seems to be nothing published by him anywhere else. Since the odds that there are two Andre Fischer in the decimal time community are slim, to put it mildly, it's likely that that is indeed the Fischer, and that everything posted about him here has been posted by said member of the "Decimal Time forum" himself. 213.112.5.132 11:30, 13 Dec 2004 (UTC)
I have not posted anything here, however someone I know has taken the liberty of doing so, without my permission. I contacted Wikipedia a year ago to have this copyright protected material removed. (as you can see below) My work is Not to be posted anywhere on this site. furtherfore, neither my name nor personal information is to be posted on this site. One sentence, in apparent violation of WP:NLT, has been removed here. The IP who posted it is welcome to replace this annotation with any clearer statement that is consistent with that policy. In that case, they should add "~~~ 02:10, 30 January 2006 & ~~~~~" in place of the "unsigned" notation at the end of this paragraph, to properly document both of their edits. Thank You! A.F. 30 January 2006. —The preceding unsigned comment was added by 81.225.195.17 ( talk • contribs) 02:10, 30 January 2006 (UTC)
A short note -- the mention of Microsoft Excel time equivalent was removed because, in this person's opinion, an encyclopedia should not be making reference to proprietary numerical systems that could change and render the page inaccurate.
~~~~
, which inserts your name and date/time, rather than posting anonymously; otherwise, it appears to part of the following comments, which were posted by someone else last year. While I'm at it, it's also recommended that you register a username. --
Nike 01:13, 12 August 2005 (UTC)How about rewriting the article, itself? There's a number of issues with it, such as misstatements of fact, like "Decimal time remained in tentative use in France until the official introduction of the metric system (or Système International d'Unités [SI]) on April 7, 1795." (SI was not introduced until 1954, and is only the latest version of the metric system, differing significantly from the 1795 version.) The "Cent time" referred to has no source, and is simply one of many vanity decimal time systems. And I have no clue what either "serial time" or "integer time" are, except that they resemble, but not exactly, Unix time. (sic) These seem to be simply neologisms.
And "metric time" is simply the base unit of time interval (the second) as defined by the modern metric system (along with multiples and submultiples, like the millisecond) in spite of all the funky clocks individuals have made with that name. And since I see that there is also an article named Metric time, it probably also could use a rewrite, to distguish it from decimal time. (Most of that article seems to have little to do with the metric system, and should probably be moved to this article.)
I don't know which "decimal time advocates" are being referred to, but there does not seem to be an organized movement with stated goals. Decimal time is already used by astronomers, in the form of decimal fractions of the day (such as 2000 Jan. 1.5, where .5 represents noon) but this is only barely mentioned. More could also be said of French decimal time, and nothing has been said of ancient Egyptian and Chinese forms of decimal time. There are also other important applications of decimal time not mentioned, such as in computer programs like Microsoft Excel.
After all that, I guess I should volunteer, if nobody else wants to. -- Nike 06:12, 19 Dec 2004 (UTC)
I moved everything around, removed some irrelevant stuff and added material, including references. Since the article on metric time was similar to this one, they should either be distinct or merged, so I wrote this article to focus on decimal time as it is usually defined, that is, as time of day, and metric time refers specifically to units of measuring time interval defined using metric rules. I tried to make the two articles complementary, instead of contradictary. -- Nike 11:54, 23 Dec 2004 (UTC)
I have refactored the talk page, so that all comments are in chronological order. -- Nike 07:15, 25 Dec 2004 (UTC)
It has come to my attention that my copyright protected material was posted here without my permission, it seems that someone had copied the material directly from the Decimal Time site. This material, which includes the Prodecimal System and Cent Time is not to be posted here. Fischer 17:10, 19 Apr 2005 (UTC) This simulated 4-tilde signature accurately reflects the editor's registered login, but the accurate UTC time of the edit that placed the time-stamp was 16:12, and they added minor changes to the 'graph at 16:19 and 16:28. - - - - At 02:11, 30 January 2006 (UTC), User:81.225.195.17 replaced (twice within this section including in this 'graph) an accurate piped lk to this contribution's editor's user page, with User:D.A., thereby referencing the potential user page of an account that has never been used to contribute. The accurate user lk has been restored.
FWIW, the user formerly known as Fischer claims that he did not post the material in question, in spite of the fact that the poster was on the same IP subnet. Rather, he says that someone he knows must have done it without his knowledge or permission. The original author did not use his name, and as I recall denied being Mr. Fischer. Given the information, I think we must assume that the copyright really was violated, although that does not justify all of the edits. -- Nike 14:05, 8 February 2006 (UTC)
I see the problem. I had assumed that the existing text had quoted the correct decree for decimal time. In fact, as the first reference will show, the quoted paragraph is from the decree of 5 October 1793, which also established the Revolutionary Calendar - although without names, in the Quaker manner. Read your source, before claiming inaccuracy.
Indeed [1] the external link correctly says:
Reading the text, there or here would have shown that the modification consisted of naming the fractions of the day.
The claim that the Revolutionary calendar is based upon Egyptian usage is both unsourced and implausible. If any ancient parallel affected the decision, the Greek division of the lunar month (29 or 30 days) into three decades is preferable, if still unlikely and speculative. Septentrionalis 18:14, 15 May 2005 (UTC)
Merging of a minor fraction of the content of Decimalization of time of day was accomplished earlier this month by copy and paste, with the history being overwritten with a rdr instead of merging it. I am performing the belated history merge, and recording here which edits were made under the name that has been turned into a rdr.
Since the history of Decimal time runs close to 200 entries, and the four entries of Decimalization of time of day's have only the merging edit of Decimal time interposing itself between any two of them, there is no benefit to copying here the whole pre-merge history of the older & non-rdr'd article.
Note Well: The undelete portion of the delete-move-undelete sequence apparently takes some time to be effective; until then the self redirect will be the most recent version available. A reversion to the 15 September 2005 revision may be necessary when it again becomes available.
OK, there it is; reverting momentarily.
--
Jerzy•
t 18:47, 17 September 2005 (UTC)--
The four italicized entries were made under the title Decimalization of time of day
This obsession to convert everything to decimal is misguided. Decimal is an arbitrary and not very useful number base. The time system as it exists is much more useful than decimal, because it's easy to divide minutes or hours into into 2, 3, 4, 5, and 6 parts, or to divide days into 2, 3, 4 or 6 parts. With decimal you're limited to dividing your time periods evenly by 2, 5, and maybe 4.
We should change our number base, rather than our time system. See the Duodecimal, or "dozenal" system.
It's a simple matter of Wikipedia etiquette. We shouldn't have to go to the history page to figure out who said what. Also, signatures let us know where one person's comments end and another's begins. Imagine if nobody bothered; you would have to check the history for every single comment, and would probably get confused about who actually said what. But I shouldn't need to explain that here: it's the policy across Wikipedia. -- Nike 12:15, 26 June 2006 (UTC)
Was said by whom? Do you have any sources? MvR 16:26, 29 July 2006 (UTC)
I don't know where that came from. Maybe there is a conflation with the Republican system, since the French Revolutionary calendar was explicitly said to be based upon the Egyptian calendar. [3] However, the French noted that Egypt had a 24-hour day. I asked someone who has repeatedly made this claim for sources, and he had none. -- Nike 07:01, 30 July 2006 (UTC)
How was the zero point of French Revolutionary Time determined? Was it based on:
Moreover, did they ever try to share their idea with the world? And if so, did they intend other parts of the world to adapt it into their own local time, or to follow their time in the style of Swatch Internet Time, or what? -- Smjg 15:23, 10 February 2007 (UTC)
To answer the first question, decimal time followed the same practice as duodecimal time, which was then true solar time, not mean solar time. GMT was not yet standard then even in England, and the French later used temps moyen de Paris until 1911, and never did use GMT by name even to this day, so they certainly would not have used Greenwich time in 1793. Thus, in Paris they would have used temps vrai de Paris, and elsewhere temps vrai that is, true or apparent time, for that location, as might be observed on a sun dial. At the time, people adjusted their clocks and watches daily according to the sun, since the devices were not that precise anyway. And in decimal time, there was no "zero" hour, but l'heure dix, hour 10. Documents of the period state that the first day of the Republican Calendar, of which decimal time was a part, was determined according to when the autumnal equinox was observed at the Paris Observatory in temps vrai.
Regarding the second question, the calendar was imposed throughout the Empire, in Europe and overseas, but decimal time was little used even in France. They certainly tried to get scientists in other countries involved with their whole new system of decimal measures, but this was hampered by the fact that they were often at war with these same countries. The rejection of decimal time outside France is often given as a primary reason why it was abandoned. However, had it been used elsewhere, it would have been according to local solar time, since there was then no radio or even telegraph to synchronize time between cities. The concept of standard time and of time zones had not yet been implemented, and would not be for the better part of the next century. -- Nike 21:58, 10 February 2007 (UTC)
In one of his essays, Isaac Asimov argued that a space-faring mankind would use the day as its base unit because of the circadian rythms of human body and the meaninglessness of Earth movements in outside of the Solar System. He proposed that the day would be divided decimally.
I do not remember a reference, but these essays seem promising:
-- 84.20.17.84 ( talk) 10:53, 20 November 2007 (UTC)
The reference to the apparent decimal time system used in the futuristic dystopia depicted in Metropolis is interesting if it is factual. However, evidence needs to be cited to back up the argument that the decimal clock portrayed in the film represents a lengthening of the standard work shift from 8 to 10 hours (if a work shift of 8 hours was indeed standard in 1927 Germany).
Also, the supporting statement: "Since a normal day cannot be divided into a whole number of such shifts, a 24-hour clock is displayed above the shift clock to give the actual time of day" is either incorrect or misleading. The 24-hour clock may be there for any reason Lang imagined it, perhaps to help workers acclimate to the decimal system. More importantly, the 20-decihour day can be evenly divided into 2 half-day shifts of 10 decihours each, making each shift (by our reckoning) 12 hours long. It's a draconian labor practice, but German weapons factories at the time the film was made did operate on a two-shift system, rather than the three-shift system we're accustomed to today. Rangergordon ( talk) 10:38, 31 May 2008 (UTC)
There is currently a revert war on this talk page. The problem is that someone is repeatedly removing historical content. This is totally inappropriate. The claim is that the discussion somehow violates copyright. In fact, there are few details about the supposedly copyrighted material, and discussion about such material is not itself a violation of copyright, but rather fair use. Much of the deleted material was written by myself, and by others who did not consent to the deletion. You do not have the right to violate our free speech through your censorship. Such deletions are in violation of WP policy and will be reverted every time. I will also discuss this on my blog, which you cannot delete. -- Nike ( talk) 22:37, 28 March 2010 (UTC)
I did not realize that you already reverted my revert while I was typing my previous comment. Once again you blanked out huge sections of this page. The copyrighted material was removed years ago. I am frankly puzzled as to why you keep deleting parts which don't even mention "prodecimal". Simply mentioning something is not a violation of copyright, and you do not have the right to edit or remove others' comments here, for reasons which have already been stated on this talk page. Given that this is a talk page, attached to an obscure article, few are likely to read what is posted here, but the irony is that by trying to redact it you are simply drawing attention to what you are trying to hide! -- Nike ( talk) 10:12, 30 March 2010 (UTC)
How can you tell me that the copyrighted material was removed years ago when there is clearly a link to it under---"Archived text of Prodecimal system". Posting this text is unacceptable to me, and quite frankly also totally irrelevant to the discussion of Decimal time, so simply leave this text out of the discussion so that I no longer have to keep removing it, please. regards, 213.100.87.94 ( talk) 12:50, 30 March 2010 (UTC)A. Fischer
You might be OK to delete your own work that was posted w/o permission, but you do not have the right to remove the rest of what you did. In fact, part of what you deleted explained that to you. You should read it. If you want to remove the archived text of prodecimal system, you can make a case for that, as someone stated previously, but you should not delete the words of others. As someone wrote earlier, you can make a request as stated at Wikipedia:Copyrights to have your work removed. Also read what Jerzy posted on this page. -- Nike ( talk) 17:22, 30 March 2010 (UTC)
A decimal system implies a base of 10. Given that, how is this Chinese system of ke, shi and fen a decimal system? If the day is divided into 100 ke, and each ke is divided into 60 fen, then the bases are 100 and 60, not 10. I can't see that it's got anything to do with decimal at all.
I don't really know anything about this subject, so have no strong opinions on the matter. I just happened to read the article, and find it strange that an article on decimal time starts with a discussion of what appears to be a non-decimal system. Faagel ( talk) 00:07, 28 April 2010 (UTC)
So are you suggesting that this section be removed? Or simply reworded? If the latter, how would you prefer it be stated?
Being decimal does not require that multiples and divisions be a factor of ten, but integer powers of ten. For instance, the French divided the decimal hour into 100 minutes, and the decimal minute into 100 seconds, and they did not use decimal notation, e.g. 9.5 decimal hours, but would instead say 9 hours 50 minutes decimal. Likewise, the right angle was divided into 100 grades.
I would defend the ke as a decimal time unit, because it divides the day by a power of ten. Obviously, none of the other units mentioned are decimal. But I think that the ke is significant to this article, as it is equivalent to what Lagrange called centi-jour or centiday, and Rey-Pailhade called cé, and the Chinese were likely the first to use the decimal system. It could be worded differently, however. -- Nike ( talk) 23:39, 29 April 2010 (UTC)
The article originally just referred to to ke, for which I have seen a number of references. I am not familiar with the other units, but it seems implied that ke originated as a decimal division of the day, that shi originated independently (likely from the 24-hour system of the Middle East) and fen was introduced later to rationalize the two incompatible systems. Perhaps shi and fen are not appropriate to the article (I have noticed that WP articles tend to accumulate irrelevant crud over time) but that does not mean that ke isn't. I would like to see the source for "two or three millennia" for ke, but I have read that the decimal system, itself, was in use in China in the 6th century BCE. The Chinese had an ancient history of using the decimal system, so it seems doubtful that they chose 100 by coincidence, but even if they did, it would still be a decimal division of the day, regardless of that fact that nondecimal time units also existed. -- Nike ( talk) 05:53, 1 May 2010 (UTC)
So this section clearly should be clarified. Not only was the ke or k'o a decimal division of the day, at least part of the time, but it was also divided decimally, at least part of the time. The fact that the history of time in China going back thousands of years is somewhat complicated should probably not be surprising. It was also complicated in the West. -- Nike ( talk) 09:41, 3 May 2010 (UTC)
Why was the link to the Decimal Time Applet removed and replaced on 30 June 2011? The existing link was relevant and produced the correct decimal time (for me at least). I can understand adding a new link but why remove a relevent link? -- Stevep99 ( talk) 12:26, 9 July 2011 (UTC)
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In the section "Decimal Year" with definition and conversion table; I believe "More exactly, a year is 365.25 days long, so a tenth of the year is 36.525 days (36 days, 12 hours, 36 minutes)" should use the more accurate 365.24 days per year. This is no more confusing while marginally more precise and informative. If so, the tabular values should also be adjusted.
(or 34.56 minutes). If necessary references can easily link to other Wikipedia topics. I leave this for consensus by others more expert than I. HalFonts ( talk) 02:38, 19 February 2012 (UTC)
365.24 days is commonly used as the 2-digit approximation in numerous other Wikipedia time, articles -- all of which need to be cleaned up and coordinated. (In process?)
As an aside I thought, Why invent something new? With GPS and Global Time Standards, all using decimal (or binary) computational equipment -- What has become the defacto decimal time standard? Horror-of-horrors, GPS uses "Weeks and Seconds" in it's global time transmissions. And SI/Metric standardized on The Second (with no rational relation to Earth Day or Year). So, I give up any hope for (decimal/binary) calendar rationality. Just give it back to the churches, and be done with it HalFonts ( talk) 18:44, 19 February 2012 (UTC)
Might be appropriate to make them into a single article: Metric time. Interlaker ( talk) 14:52, 19 March 2013 (UTC)
I noticed that there is a French quote without any translation here:
... et la distance périhélie, égale à 1,053095 ; ce qui a donné pour l'instant du passage au périhélie, sept.29j,10239, temps moyen compté de minuit à Paris. Les valeurs précédentes de a, b, h, l, relatives à trois observations, ont donné la distance périhélie égale à 1,053650; et pour l'instant du passage, sept.29j,04587; ce qui diffère peu des résultats fondés sur cinq observations. — Pierre-Simon Laplace , Traité de Mécanique Céleste
I'm proposing the following translation:
... and the herihelion distance, equal to 1.053095; which has given the time of passage at the perihelion as sept.29d.10239, mean time counted from midnight in Paris. The preceding values of a, b, h, l, relative to three observations, have given a perihelion distance equal to 1.053650; and for the the time of passage, sept.29d.04587; which differs little from the results founded on five observations.
I'm not putting it right in the article because I'm not sure how the "sept.29j,10239" should be formatted. The "j" would have to become "d", it seems (jour = day), but would the comma become a period? Does the comma signify the decimal point here?
Also, I'm not sure of the formatting for an in-text translation.
Terrencereilly ( talk) 11:48, 23 May 2013 (UTC)
Someone added an external link which appears totally unsuitable, for several reasons. I looked at the other links, and all of them also have issues. One of them had a 404 error, so I removed it. (Another had an expired certificate that my computer blocked.) I see the value of demonstrating decimal time, but don't know of any links that aren't original research or have other issues. Perhaps we could just show the decimal time with a template and not use any external links. -- Nike ( talk) 08:45, 2 April 2015 (UTC)
Sirs,
The said clock Decimal Clock (Decimal date and time Java JRE by Grant Hardy.) meets and is added based on your own criteria in response to a user in Nike's talk page, as
quote begins
quote ends
Please do not undo my edits 86.31.47.92 ( talk) 09:44, 2 April 2015 (UTC)
Sirs, The mentioned link is a sub-page address and connects (at the bottom of the page) only to the picture of Java software implementation of a decimal clock that divides solar day to 20 hours. That is, at coordinates of equator daylight is counted 10 (i.e., deci) hours (instead of 12 in traditional clock and 5 in French Revolution clock) and night also 10 (i.e., deci) hours (instead of 12 in traditional clock and 5 in French Revolution clock). The clock is similar to mechanical one at the picture at the top of the article but it is twice precise in its established standard (not the measurement precision) than the pictured clock. Each hour is one hectominutes and each minute one hectosecond. The removed link is not a link to the original study or studies in that website. To run the program, for those who are interested, please install Java JRE which is already installed on almost any computer. If your computer is Linux you need to elevate permission of the file to an executable, before double clicking on it. 86.31.47.92 ( talk) 10:13, 15 April 2015 (UTC)
Ah Sir, Your computer needs many things to be enabled to run anything such as Wikipedia, such as OS, Java, html. Java is one pillar of computing. The rule you mentioned says,
Direct links to documents that require external applications or plugins (such as Flash or Java) to view the content, unless the article is about such file formats. See rich media for more details.
(My emphasizes.) My mentioned link does not fall in this category it links to an html/text page. There, there is a decimal-time clock similar to one that its picture being put atop of this article as the mechanical French Revolution clock, but it is not mechanical; it is digital. For example, you have mechanical Slide Rule that if you are interested in history you buy it as a collectible item, and now you have digital slide rules on the internet that people who are interested but have not money can put on their computer and use it and get the feeling. 86.31.47.92 ( talk) 06:57, 16 April 2015 (UTC)
Sir, You are not owner of Wikipedia and god forbids a sock-puppet. You also have not any gain or personal conflicting interest in promoting the obsolete French Revolution symbols. It is only that you enjoy perhaps using decimal-metric ideas; it is only you find that thing interesting. I noticed the clock picture is different from and more readable than the version I am using on my desktop. That page is always under revision and correction as it announces certain solar times changing on a seasonal basis. It is written in a corner of their page. I am not as deceptive as Wikipedia foundation overall. The link refers to just the sub-page part of the web-page, the part related to clock and calendar. The calendar at that place has divided each interval between two consecutive equinox into ten months which is also decimal and interesting. I enjoy using things in metric system and divisions of ten. I also am a frequent to many slide rule websites. None of them has any personal promotion for me. I enjoy watching and using a slide rule. By the way I can remain more anonymous than now if I choose some log-in user name and prop up an immediate yahoo or google mail. You are also anonymous. 86.31.47.92 ( talk) 11:45, 18 April 2015 (UTC)
I'm not sure whether it's relevant for this article, but when I read it I came to think of how speed skating results are handled. When a 500 m competition, for example in the Olympics, is run, each skater run the distance twice and the times are added. Say that a skater runs once in 35 s and once in 36 s. The result is then written as 71 s, not as 1 min 11 s or something alike.
Also the samalog rules used in speed skating competitions and statistics might qualify as a kind of decimal time. Fomalhaut76 ( talk) 07:54, 23 September 2015 (UTC)
My first ever edit on wikipedia, ten years ago, was to add a conversions section, which survives to this day but happily much improved. The incremental improvements and expansions on wikipedia through its history have been amazing. Let noone say that that wikipedia is not a fantastic place. :-) -- Nanite ( talk) 23:05, 25 November 2015 (UTC)
I'm trying to figure out which time zone I would be in when decimal time is finally seen as sane and "why didn't we do this sooner?". Taking current longitude (118*W; Pacific Time Zone) and dividing by 36, gives me 3.2778. Question is, do I round up (to 4 in this case; knock the bits off to the right of the decimal point), am I in the third time zone (keep the bits to the right of the decimal point), or should I figure it out via International Date Line (where 10:00:00/00:00:00 would be)? 108.13.17.82 ( talk) 23:00, 2 June 2016 (UTC)
I've used the decimal system for over 30 years in my professional work and never seen this term, probably because it was obsolete before I was born. More useful and used are decasecond and heptosecond, but we don’t introduce these. By the time we get to kilosecond (a little over 1/4 hour), we shift to units of minutes, hours, days, or whatever is appropriate. I think this bit of historical trivia should be deleted or replaced. Someone has engaged in an exposition of their erudition IMHO. Sbalfour ( talk) 19:01, 20 October 2020 (UTC)
In modern representation of time of day, colons (:) are used to separate sexigesimal divisions, especially in English-speaking countries. In historical documents, units were typically followed by their names, or abbreviations thereof, i.e. hours, minutes, and seconds (hms). This is still practiced in francophone countries. In addition, sometimes the superscripts that are still used for sexigesimal divisions of angular degrees was used for time of day, e.g. 12h 0' 0". These same methods were also used to represent decimal time of day during the Revolution. An example with abbreviations may be seen in the article: 9 h. 92 m.
An example of the alternate representation: à 3h 86’, which is also represented as 0,386 or 0j386, that is, 3 decimal hours 86 decimal minutes, or 0.386 day.
Does anyone know when and how colons were introduced?
-- Nike ( talk) 04:28, 13 November 2020 (UTC) (Tridi 23 Brumaire an CCXXIX à 1h 92’ t.m.P.)
There is a website from the decimal time association with a decimal time clock and calendar: decimal-time.org. — Preceding unsigned comment added by 77.191.128.242 ( talk) 17:26, 7 May 2022 (UTC)
I think the example of aviation using decimal hours is a poor one, as this is not a common thing across the rest of aviation in my experience. The example given is specifically the recording of flight time in the Pilot's Logbook which is an official legal document which can be used to verify things like currency requirements (minimum recent flight experience needed to perform certain operations, etc.) so the fact that this is recorded in decimal hours and fractions thereof is convenient as it makes it quick to manually total up. But the PRIMARY reason this is done is that typically it's a record of the engine total operating time meter in the plane (often referred to as the Hobbs Meter /info/en/?search=Hobbs_meter) which records a continuous non-resettable count of hours and (generally) tenths of hours. But such meters and their recording for maintenance or other purposes is not specific to aviation but is very common across many electro-mechanical systems (engines of all sorts, mainframe computers and some peripherals, etc.) so I feel the current entry will make people think this is some general feature of aviation and I don't think that's the case. 2601:245:4100:B781:C53D:3AB:992B:444F ( talk) 00:23, 14 May 2022 (UTC)
What is this? The only source is a personal GitHub page, so it appears to be personal research, as well as not notable, and therefore needs to be deleted, unless shown to be otherwise. ------ L'an CCXXXI De la Republique francaise une et indivisible Le Six frimaire à Deux heures Neuf Décimes temps moyen du Paris Nike ( talk) 06:51, 27 November 2022 (UTC)
The table at the top of start of the topic is a little confusing. I guess that the discrepancy between the three representations is due to the different zones, but this is far from obvious. An explanatory caption would help. Roly ( talk) 14:30, 25 March 2023 (UTC)
Some of the dates seem to be incorrect (off-by-ones?): Table: Mar 15, Apr 20, May 27, Aug 8, Sep 13, Oct 20, Nov 25. Suggested correction: Mar 14, Apr 19, May 26, Aug 7, Sep 12, Oct 19, Nov 24. Other dates and times seem to be correct. Grateful if somebody could verify this? Domschl ( talk) 12:15, 10 June 2023 (UTC)
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I was just stumbling over this talk page on recent changes and remembering all the fun we had with Mr. Metric Time, and I realized that this page is a total mess and utterly confusing to anyone who has not been there during the discussions. Now that Mr Voorman has left (for good, hopefully :P) and won't be clearing the page anymore, would it be appropriate to at least sort the old discussions chronologically? I know that editing other people's comments on talk pages is a big no-no, that's why I don't just go ahead and do it, but i think that sorting the discussions might really benefit this page. -- Ferkelparade π 00:21, 22 Sep 2004 (UTC)
I think refactoring would be fine, as long as you dont lose content or context: in fact, your right in saying we would get more context if you refactored. I would do it myself, only I still shuder whenever these pages appear on my watchlist, and so I dont think I can be sufficently neutral! Iain 08:37, 22 Sep 2004 (UTC)
A Google search reveals that Andre Fischer is famous as "a member from the Decimal Time forum." There seems to be nothing published by him anywhere else. Since the odds that there are two Andre Fischer in the decimal time community are slim, to put it mildly, it's likely that that is indeed the Fischer, and that everything posted about him here has been posted by said member of the "Decimal Time forum" himself. 213.112.5.132 11:30, 13 Dec 2004 (UTC)
I have not posted anything here, however someone I know has taken the liberty of doing so, without my permission. I contacted Wikipedia a year ago to have this copyright protected material removed. (as you can see below) My work is Not to be posted anywhere on this site. furtherfore, neither my name nor personal information is to be posted on this site. One sentence, in apparent violation of WP:NLT, has been removed here. The IP who posted it is welcome to replace this annotation with any clearer statement that is consistent with that policy. In that case, they should add "~~~ 02:10, 30 January 2006 & ~~~~~" in place of the "unsigned" notation at the end of this paragraph, to properly document both of their edits. Thank You! A.F. 30 January 2006. —The preceding unsigned comment was added by 81.225.195.17 ( talk • contribs) 02:10, 30 January 2006 (UTC)
A short note -- the mention of Microsoft Excel time equivalent was removed because, in this person's opinion, an encyclopedia should not be making reference to proprietary numerical systems that could change and render the page inaccurate.
~~~~
, which inserts your name and date/time, rather than posting anonymously; otherwise, it appears to part of the following comments, which were posted by someone else last year. While I'm at it, it's also recommended that you register a username. --
Nike 01:13, 12 August 2005 (UTC)How about rewriting the article, itself? There's a number of issues with it, such as misstatements of fact, like "Decimal time remained in tentative use in France until the official introduction of the metric system (or Système International d'Unités [SI]) on April 7, 1795." (SI was not introduced until 1954, and is only the latest version of the metric system, differing significantly from the 1795 version.) The "Cent time" referred to has no source, and is simply one of many vanity decimal time systems. And I have no clue what either "serial time" or "integer time" are, except that they resemble, but not exactly, Unix time. (sic) These seem to be simply neologisms.
And "metric time" is simply the base unit of time interval (the second) as defined by the modern metric system (along with multiples and submultiples, like the millisecond) in spite of all the funky clocks individuals have made with that name. And since I see that there is also an article named Metric time, it probably also could use a rewrite, to distguish it from decimal time. (Most of that article seems to have little to do with the metric system, and should probably be moved to this article.)
I don't know which "decimal time advocates" are being referred to, but there does not seem to be an organized movement with stated goals. Decimal time is already used by astronomers, in the form of decimal fractions of the day (such as 2000 Jan. 1.5, where .5 represents noon) but this is only barely mentioned. More could also be said of French decimal time, and nothing has been said of ancient Egyptian and Chinese forms of decimal time. There are also other important applications of decimal time not mentioned, such as in computer programs like Microsoft Excel.
After all that, I guess I should volunteer, if nobody else wants to. -- Nike 06:12, 19 Dec 2004 (UTC)
I moved everything around, removed some irrelevant stuff and added material, including references. Since the article on metric time was similar to this one, they should either be distinct or merged, so I wrote this article to focus on decimal time as it is usually defined, that is, as time of day, and metric time refers specifically to units of measuring time interval defined using metric rules. I tried to make the two articles complementary, instead of contradictary. -- Nike 11:54, 23 Dec 2004 (UTC)
I have refactored the talk page, so that all comments are in chronological order. -- Nike 07:15, 25 Dec 2004 (UTC)
It has come to my attention that my copyright protected material was posted here without my permission, it seems that someone had copied the material directly from the Decimal Time site. This material, which includes the Prodecimal System and Cent Time is not to be posted here. Fischer 17:10, 19 Apr 2005 (UTC) This simulated 4-tilde signature accurately reflects the editor's registered login, but the accurate UTC time of the edit that placed the time-stamp was 16:12, and they added minor changes to the 'graph at 16:19 and 16:28. - - - - At 02:11, 30 January 2006 (UTC), User:81.225.195.17 replaced (twice within this section including in this 'graph) an accurate piped lk to this contribution's editor's user page, with User:D.A., thereby referencing the potential user page of an account that has never been used to contribute. The accurate user lk has been restored.
FWIW, the user formerly known as Fischer claims that he did not post the material in question, in spite of the fact that the poster was on the same IP subnet. Rather, he says that someone he knows must have done it without his knowledge or permission. The original author did not use his name, and as I recall denied being Mr. Fischer. Given the information, I think we must assume that the copyright really was violated, although that does not justify all of the edits. -- Nike 14:05, 8 February 2006 (UTC)
I see the problem. I had assumed that the existing text had quoted the correct decree for decimal time. In fact, as the first reference will show, the quoted paragraph is from the decree of 5 October 1793, which also established the Revolutionary Calendar - although without names, in the Quaker manner. Read your source, before claiming inaccuracy.
Indeed [1] the external link correctly says:
Reading the text, there or here would have shown that the modification consisted of naming the fractions of the day.
The claim that the Revolutionary calendar is based upon Egyptian usage is both unsourced and implausible. If any ancient parallel affected the decision, the Greek division of the lunar month (29 or 30 days) into three decades is preferable, if still unlikely and speculative. Septentrionalis 18:14, 15 May 2005 (UTC)
Merging of a minor fraction of the content of Decimalization of time of day was accomplished earlier this month by copy and paste, with the history being overwritten with a rdr instead of merging it. I am performing the belated history merge, and recording here which edits were made under the name that has been turned into a rdr.
Since the history of Decimal time runs close to 200 entries, and the four entries of Decimalization of time of day's have only the merging edit of Decimal time interposing itself between any two of them, there is no benefit to copying here the whole pre-merge history of the older & non-rdr'd article.
Note Well: The undelete portion of the delete-move-undelete sequence apparently takes some time to be effective; until then the self redirect will be the most recent version available. A reversion to the 15 September 2005 revision may be necessary when it again becomes available.
OK, there it is; reverting momentarily.
--
Jerzy•
t 18:47, 17 September 2005 (UTC)--
The four italicized entries were made under the title Decimalization of time of day
This obsession to convert everything to decimal is misguided. Decimal is an arbitrary and not very useful number base. The time system as it exists is much more useful than decimal, because it's easy to divide minutes or hours into into 2, 3, 4, 5, and 6 parts, or to divide days into 2, 3, 4 or 6 parts. With decimal you're limited to dividing your time periods evenly by 2, 5, and maybe 4.
We should change our number base, rather than our time system. See the Duodecimal, or "dozenal" system.
It's a simple matter of Wikipedia etiquette. We shouldn't have to go to the history page to figure out who said what. Also, signatures let us know where one person's comments end and another's begins. Imagine if nobody bothered; you would have to check the history for every single comment, and would probably get confused about who actually said what. But I shouldn't need to explain that here: it's the policy across Wikipedia. -- Nike 12:15, 26 June 2006 (UTC)
Was said by whom? Do you have any sources? MvR 16:26, 29 July 2006 (UTC)
I don't know where that came from. Maybe there is a conflation with the Republican system, since the French Revolutionary calendar was explicitly said to be based upon the Egyptian calendar. [3] However, the French noted that Egypt had a 24-hour day. I asked someone who has repeatedly made this claim for sources, and he had none. -- Nike 07:01, 30 July 2006 (UTC)
How was the zero point of French Revolutionary Time determined? Was it based on:
Moreover, did they ever try to share their idea with the world? And if so, did they intend other parts of the world to adapt it into their own local time, or to follow their time in the style of Swatch Internet Time, or what? -- Smjg 15:23, 10 February 2007 (UTC)
To answer the first question, decimal time followed the same practice as duodecimal time, which was then true solar time, not mean solar time. GMT was not yet standard then even in England, and the French later used temps moyen de Paris until 1911, and never did use GMT by name even to this day, so they certainly would not have used Greenwich time in 1793. Thus, in Paris they would have used temps vrai de Paris, and elsewhere temps vrai that is, true or apparent time, for that location, as might be observed on a sun dial. At the time, people adjusted their clocks and watches daily according to the sun, since the devices were not that precise anyway. And in decimal time, there was no "zero" hour, but l'heure dix, hour 10. Documents of the period state that the first day of the Republican Calendar, of which decimal time was a part, was determined according to when the autumnal equinox was observed at the Paris Observatory in temps vrai.
Regarding the second question, the calendar was imposed throughout the Empire, in Europe and overseas, but decimal time was little used even in France. They certainly tried to get scientists in other countries involved with their whole new system of decimal measures, but this was hampered by the fact that they were often at war with these same countries. The rejection of decimal time outside France is often given as a primary reason why it was abandoned. However, had it been used elsewhere, it would have been according to local solar time, since there was then no radio or even telegraph to synchronize time between cities. The concept of standard time and of time zones had not yet been implemented, and would not be for the better part of the next century. -- Nike 21:58, 10 February 2007 (UTC)
In one of his essays, Isaac Asimov argued that a space-faring mankind would use the day as its base unit because of the circadian rythms of human body and the meaninglessness of Earth movements in outside of the Solar System. He proposed that the day would be divided decimally.
I do not remember a reference, but these essays seem promising:
-- 84.20.17.84 ( talk) 10:53, 20 November 2007 (UTC)
The reference to the apparent decimal time system used in the futuristic dystopia depicted in Metropolis is interesting if it is factual. However, evidence needs to be cited to back up the argument that the decimal clock portrayed in the film represents a lengthening of the standard work shift from 8 to 10 hours (if a work shift of 8 hours was indeed standard in 1927 Germany).
Also, the supporting statement: "Since a normal day cannot be divided into a whole number of such shifts, a 24-hour clock is displayed above the shift clock to give the actual time of day" is either incorrect or misleading. The 24-hour clock may be there for any reason Lang imagined it, perhaps to help workers acclimate to the decimal system. More importantly, the 20-decihour day can be evenly divided into 2 half-day shifts of 10 decihours each, making each shift (by our reckoning) 12 hours long. It's a draconian labor practice, but German weapons factories at the time the film was made did operate on a two-shift system, rather than the three-shift system we're accustomed to today. Rangergordon ( talk) 10:38, 31 May 2008 (UTC)
There is currently a revert war on this talk page. The problem is that someone is repeatedly removing historical content. This is totally inappropriate. The claim is that the discussion somehow violates copyright. In fact, there are few details about the supposedly copyrighted material, and discussion about such material is not itself a violation of copyright, but rather fair use. Much of the deleted material was written by myself, and by others who did not consent to the deletion. You do not have the right to violate our free speech through your censorship. Such deletions are in violation of WP policy and will be reverted every time. I will also discuss this on my blog, which you cannot delete. -- Nike ( talk) 22:37, 28 March 2010 (UTC)
I did not realize that you already reverted my revert while I was typing my previous comment. Once again you blanked out huge sections of this page. The copyrighted material was removed years ago. I am frankly puzzled as to why you keep deleting parts which don't even mention "prodecimal". Simply mentioning something is not a violation of copyright, and you do not have the right to edit or remove others' comments here, for reasons which have already been stated on this talk page. Given that this is a talk page, attached to an obscure article, few are likely to read what is posted here, but the irony is that by trying to redact it you are simply drawing attention to what you are trying to hide! -- Nike ( talk) 10:12, 30 March 2010 (UTC)
How can you tell me that the copyrighted material was removed years ago when there is clearly a link to it under---"Archived text of Prodecimal system". Posting this text is unacceptable to me, and quite frankly also totally irrelevant to the discussion of Decimal time, so simply leave this text out of the discussion so that I no longer have to keep removing it, please. regards, 213.100.87.94 ( talk) 12:50, 30 March 2010 (UTC)A. Fischer
You might be OK to delete your own work that was posted w/o permission, but you do not have the right to remove the rest of what you did. In fact, part of what you deleted explained that to you. You should read it. If you want to remove the archived text of prodecimal system, you can make a case for that, as someone stated previously, but you should not delete the words of others. As someone wrote earlier, you can make a request as stated at Wikipedia:Copyrights to have your work removed. Also read what Jerzy posted on this page. -- Nike ( talk) 17:22, 30 March 2010 (UTC)
A decimal system implies a base of 10. Given that, how is this Chinese system of ke, shi and fen a decimal system? If the day is divided into 100 ke, and each ke is divided into 60 fen, then the bases are 100 and 60, not 10. I can't see that it's got anything to do with decimal at all.
I don't really know anything about this subject, so have no strong opinions on the matter. I just happened to read the article, and find it strange that an article on decimal time starts with a discussion of what appears to be a non-decimal system. Faagel ( talk) 00:07, 28 April 2010 (UTC)
So are you suggesting that this section be removed? Or simply reworded? If the latter, how would you prefer it be stated?
Being decimal does not require that multiples and divisions be a factor of ten, but integer powers of ten. For instance, the French divided the decimal hour into 100 minutes, and the decimal minute into 100 seconds, and they did not use decimal notation, e.g. 9.5 decimal hours, but would instead say 9 hours 50 minutes decimal. Likewise, the right angle was divided into 100 grades.
I would defend the ke as a decimal time unit, because it divides the day by a power of ten. Obviously, none of the other units mentioned are decimal. But I think that the ke is significant to this article, as it is equivalent to what Lagrange called centi-jour or centiday, and Rey-Pailhade called cé, and the Chinese were likely the first to use the decimal system. It could be worded differently, however. -- Nike ( talk) 23:39, 29 April 2010 (UTC)
The article originally just referred to to ke, for which I have seen a number of references. I am not familiar with the other units, but it seems implied that ke originated as a decimal division of the day, that shi originated independently (likely from the 24-hour system of the Middle East) and fen was introduced later to rationalize the two incompatible systems. Perhaps shi and fen are not appropriate to the article (I have noticed that WP articles tend to accumulate irrelevant crud over time) but that does not mean that ke isn't. I would like to see the source for "two or three millennia" for ke, but I have read that the decimal system, itself, was in use in China in the 6th century BCE. The Chinese had an ancient history of using the decimal system, so it seems doubtful that they chose 100 by coincidence, but even if they did, it would still be a decimal division of the day, regardless of that fact that nondecimal time units also existed. -- Nike ( talk) 05:53, 1 May 2010 (UTC)
So this section clearly should be clarified. Not only was the ke or k'o a decimal division of the day, at least part of the time, but it was also divided decimally, at least part of the time. The fact that the history of time in China going back thousands of years is somewhat complicated should probably not be surprising. It was also complicated in the West. -- Nike ( talk) 09:41, 3 May 2010 (UTC)
Why was the link to the Decimal Time Applet removed and replaced on 30 June 2011? The existing link was relevant and produced the correct decimal time (for me at least). I can understand adding a new link but why remove a relevent link? -- Stevep99 ( talk) 12:26, 9 July 2011 (UTC)
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In the section "Decimal Year" with definition and conversion table; I believe "More exactly, a year is 365.25 days long, so a tenth of the year is 36.525 days (36 days, 12 hours, 36 minutes)" should use the more accurate 365.24 days per year. This is no more confusing while marginally more precise and informative. If so, the tabular values should also be adjusted.
(or 34.56 minutes). If necessary references can easily link to other Wikipedia topics. I leave this for consensus by others more expert than I. HalFonts ( talk) 02:38, 19 February 2012 (UTC)
365.24 days is commonly used as the 2-digit approximation in numerous other Wikipedia time, articles -- all of which need to be cleaned up and coordinated. (In process?)
As an aside I thought, Why invent something new? With GPS and Global Time Standards, all using decimal (or binary) computational equipment -- What has become the defacto decimal time standard? Horror-of-horrors, GPS uses "Weeks and Seconds" in it's global time transmissions. And SI/Metric standardized on The Second (with no rational relation to Earth Day or Year). So, I give up any hope for (decimal/binary) calendar rationality. Just give it back to the churches, and be done with it HalFonts ( talk) 18:44, 19 February 2012 (UTC)
Might be appropriate to make them into a single article: Metric time. Interlaker ( talk) 14:52, 19 March 2013 (UTC)
I noticed that there is a French quote without any translation here:
... et la distance périhélie, égale à 1,053095 ; ce qui a donné pour l'instant du passage au périhélie, sept.29j,10239, temps moyen compté de minuit à Paris. Les valeurs précédentes de a, b, h, l, relatives à trois observations, ont donné la distance périhélie égale à 1,053650; et pour l'instant du passage, sept.29j,04587; ce qui diffère peu des résultats fondés sur cinq observations. — Pierre-Simon Laplace , Traité de Mécanique Céleste
I'm proposing the following translation:
... and the herihelion distance, equal to 1.053095; which has given the time of passage at the perihelion as sept.29d.10239, mean time counted from midnight in Paris. The preceding values of a, b, h, l, relative to three observations, have given a perihelion distance equal to 1.053650; and for the the time of passage, sept.29d.04587; which differs little from the results founded on five observations.
I'm not putting it right in the article because I'm not sure how the "sept.29j,10239" should be formatted. The "j" would have to become "d", it seems (jour = day), but would the comma become a period? Does the comma signify the decimal point here?
Also, I'm not sure of the formatting for an in-text translation.
Terrencereilly ( talk) 11:48, 23 May 2013 (UTC)
Someone added an external link which appears totally unsuitable, for several reasons. I looked at the other links, and all of them also have issues. One of them had a 404 error, so I removed it. (Another had an expired certificate that my computer blocked.) I see the value of demonstrating decimal time, but don't know of any links that aren't original research or have other issues. Perhaps we could just show the decimal time with a template and not use any external links. -- Nike ( talk) 08:45, 2 April 2015 (UTC)
Sirs,
The said clock Decimal Clock (Decimal date and time Java JRE by Grant Hardy.) meets and is added based on your own criteria in response to a user in Nike's talk page, as
quote begins
quote ends
Please do not undo my edits 86.31.47.92 ( talk) 09:44, 2 April 2015 (UTC)
Sirs, The mentioned link is a sub-page address and connects (at the bottom of the page) only to the picture of Java software implementation of a decimal clock that divides solar day to 20 hours. That is, at coordinates of equator daylight is counted 10 (i.e., deci) hours (instead of 12 in traditional clock and 5 in French Revolution clock) and night also 10 (i.e., deci) hours (instead of 12 in traditional clock and 5 in French Revolution clock). The clock is similar to mechanical one at the picture at the top of the article but it is twice precise in its established standard (not the measurement precision) than the pictured clock. Each hour is one hectominutes and each minute one hectosecond. The removed link is not a link to the original study or studies in that website. To run the program, for those who are interested, please install Java JRE which is already installed on almost any computer. If your computer is Linux you need to elevate permission of the file to an executable, before double clicking on it. 86.31.47.92 ( talk) 10:13, 15 April 2015 (UTC)
Ah Sir, Your computer needs many things to be enabled to run anything such as Wikipedia, such as OS, Java, html. Java is one pillar of computing. The rule you mentioned says,
Direct links to documents that require external applications or plugins (such as Flash or Java) to view the content, unless the article is about such file formats. See rich media for more details.
(My emphasizes.) My mentioned link does not fall in this category it links to an html/text page. There, there is a decimal-time clock similar to one that its picture being put atop of this article as the mechanical French Revolution clock, but it is not mechanical; it is digital. For example, you have mechanical Slide Rule that if you are interested in history you buy it as a collectible item, and now you have digital slide rules on the internet that people who are interested but have not money can put on their computer and use it and get the feeling. 86.31.47.92 ( talk) 06:57, 16 April 2015 (UTC)
Sir, You are not owner of Wikipedia and god forbids a sock-puppet. You also have not any gain or personal conflicting interest in promoting the obsolete French Revolution symbols. It is only that you enjoy perhaps using decimal-metric ideas; it is only you find that thing interesting. I noticed the clock picture is different from and more readable than the version I am using on my desktop. That page is always under revision and correction as it announces certain solar times changing on a seasonal basis. It is written in a corner of their page. I am not as deceptive as Wikipedia foundation overall. The link refers to just the sub-page part of the web-page, the part related to clock and calendar. The calendar at that place has divided each interval between two consecutive equinox into ten months which is also decimal and interesting. I enjoy using things in metric system and divisions of ten. I also am a frequent to many slide rule websites. None of them has any personal promotion for me. I enjoy watching and using a slide rule. By the way I can remain more anonymous than now if I choose some log-in user name and prop up an immediate yahoo or google mail. You are also anonymous. 86.31.47.92 ( talk) 11:45, 18 April 2015 (UTC)
I'm not sure whether it's relevant for this article, but when I read it I came to think of how speed skating results are handled. When a 500 m competition, for example in the Olympics, is run, each skater run the distance twice and the times are added. Say that a skater runs once in 35 s and once in 36 s. The result is then written as 71 s, not as 1 min 11 s or something alike.
Also the samalog rules used in speed skating competitions and statistics might qualify as a kind of decimal time. Fomalhaut76 ( talk) 07:54, 23 September 2015 (UTC)
My first ever edit on wikipedia, ten years ago, was to add a conversions section, which survives to this day but happily much improved. The incremental improvements and expansions on wikipedia through its history have been amazing. Let noone say that that wikipedia is not a fantastic place. :-) -- Nanite ( talk) 23:05, 25 November 2015 (UTC)
I'm trying to figure out which time zone I would be in when decimal time is finally seen as sane and "why didn't we do this sooner?". Taking current longitude (118*W; Pacific Time Zone) and dividing by 36, gives me 3.2778. Question is, do I round up (to 4 in this case; knock the bits off to the right of the decimal point), am I in the third time zone (keep the bits to the right of the decimal point), or should I figure it out via International Date Line (where 10:00:00/00:00:00 would be)? 108.13.17.82 ( talk) 23:00, 2 June 2016 (UTC)
I've used the decimal system for over 30 years in my professional work and never seen this term, probably because it was obsolete before I was born. More useful and used are decasecond and heptosecond, but we don’t introduce these. By the time we get to kilosecond (a little over 1/4 hour), we shift to units of minutes, hours, days, or whatever is appropriate. I think this bit of historical trivia should be deleted or replaced. Someone has engaged in an exposition of their erudition IMHO. Sbalfour ( talk) 19:01, 20 October 2020 (UTC)
In modern representation of time of day, colons (:) are used to separate sexigesimal divisions, especially in English-speaking countries. In historical documents, units were typically followed by their names, or abbreviations thereof, i.e. hours, minutes, and seconds (hms). This is still practiced in francophone countries. In addition, sometimes the superscripts that are still used for sexigesimal divisions of angular degrees was used for time of day, e.g. 12h 0' 0". These same methods were also used to represent decimal time of day during the Revolution. An example with abbreviations may be seen in the article: 9 h. 92 m.
An example of the alternate representation: à 3h 86’, which is also represented as 0,386 or 0j386, that is, 3 decimal hours 86 decimal minutes, or 0.386 day.
Does anyone know when and how colons were introduced?
-- Nike ( talk) 04:28, 13 November 2020 (UTC) (Tridi 23 Brumaire an CCXXIX à 1h 92’ t.m.P.)
There is a website from the decimal time association with a decimal time clock and calendar: decimal-time.org. — Preceding unsigned comment added by 77.191.128.242 ( talk) 17:26, 7 May 2022 (UTC)
I think the example of aviation using decimal hours is a poor one, as this is not a common thing across the rest of aviation in my experience. The example given is specifically the recording of flight time in the Pilot's Logbook which is an official legal document which can be used to verify things like currency requirements (minimum recent flight experience needed to perform certain operations, etc.) so the fact that this is recorded in decimal hours and fractions thereof is convenient as it makes it quick to manually total up. But the PRIMARY reason this is done is that typically it's a record of the engine total operating time meter in the plane (often referred to as the Hobbs Meter /info/en/?search=Hobbs_meter) which records a continuous non-resettable count of hours and (generally) tenths of hours. But such meters and their recording for maintenance or other purposes is not specific to aviation but is very common across many electro-mechanical systems (engines of all sorts, mainframe computers and some peripherals, etc.) so I feel the current entry will make people think this is some general feature of aviation and I don't think that's the case. 2601:245:4100:B781:C53D:3AB:992B:444F ( talk) 00:23, 14 May 2022 (UTC)
What is this? The only source is a personal GitHub page, so it appears to be personal research, as well as not notable, and therefore needs to be deleted, unless shown to be otherwise. ------ L'an CCXXXI De la Republique francaise une et indivisible Le Six frimaire à Deux heures Neuf Décimes temps moyen du Paris Nike ( talk) 06:51, 27 November 2022 (UTC)
The table at the top of start of the topic is a little confusing. I guess that the discrepancy between the three representations is due to the different zones, but this is far from obvious. An explanatory caption would help. Roly ( talk) 14:30, 25 March 2023 (UTC)
Some of the dates seem to be incorrect (off-by-ones?): Table: Mar 15, Apr 20, May 27, Aug 8, Sep 13, Oct 20, Nov 25. Suggested correction: Mar 14, Apr 19, May 26, Aug 7, Sep 12, Oct 19, Nov 24. Other dates and times seem to be correct. Grateful if somebody could verify this? Domschl ( talk) 12:15, 10 June 2023 (UTC)