This is a timeline of the War in Donbass, from 1 January 2019. The timeline follows an ongoing conflict between Ukraine and anti-government pro-Russian separatists supported by Russian troops ^{[1] [2]} in the Donbass region in eastern Ukraine.

According to the information provided by the spokesman of the Ukrainian operational headquarters in the morning, pro-Russian troops had opened fire on 4 occasions on Ukrainian positions the previous day ^[3] (including once in Donetsk region and on 3 occasions in Luhansk region ^{[4] [5]}); the fire was returned once. ^[4] By morning of 1 January one ceasefire violation was registered, at Hnutove, where 82 mm mortar rounds landed at around 25 km NE from Mariupol; no casualties were reported on the Ukrainian side. ^[4] The spokesman of the Ministry of Defence confirmed at noon that two Ukrainian servicemen were wounded in action in the Donbass region on the last day of December. ^{[4] [5]}

The press-centre of the JFO reported in the evening that by 6:00 pm the second ceasefire violation had taken place, at Novotoshkivske (at around 52 km WNW from Luhansk), where positions of Ukrainian troops were engaged by pro-Russian BMP-1 infantry fighting vehicles; one Ukrainian serviceman was killed in action. ^[6]

• Information Analyses Center of the National Security and Defense Council of Ukraine, provides daily updates, maps, etc., on the current situation (in Ukrainian, Russian, and English)
• OSCE Special Monitoring Mission to Ukraine, Daily and spot reports from the Special Monitoring Mission to Ukraine