2011 CE
- Common Era
- 2011 CE
- Gregorian Calendar
- 2011 AD
- Holocene Calendar
- 12011 HE
- Japanese Calendar
- Heisei 23 (平成23年)
- Japanese Imperial Year
- Kōki 2671 (皇紀2671年)
- Chinese Sexagenary Cycle
- Yin Metal Rabbit (辛卯)
Milestones
- First human in space
- 50 years ago
- World War II ends
- 66 years ago
- Hindu-Arabic numerals introduced to Europe
- 809 years ago
- Mythical founding of Japan
- 2670 years ago
- Foundation of Rome
- 2763 years ago
- Beginning of Xia Dynasty in China
- 4111 years ago
- First Egyptian pyramid completed
- 4621 years ago
- End of the Paleolithic Period
- 12010 years ago