- 11 May 1848: German missionary Johannes Rebmann became the first European to report seeing Mount Kilimanjaro.
- 11 May 2006: Scientists announced that the Kipunji monkey found in 2003 belongs to a new genus of African monkey—the first to be discovered since 1923.
- 28 May 1992: The Civic United Front liberal party was formed.
- 11 May 1848: German missionary Johannes Rebmann became the first European to report seeing Mount Kilimanjaro.
- 11 May 2006: Scientists announced that the Kipunji monkey found in 2003 belongs to a new genus of African monkey—the first to be discovered since 1923.
- 28 May 1992: The Civic United Front liberal party was formed.