2031 CE
- Common Era
- 2031 CE
- Gregorian Calendar
- 2031 AD
- Holocene Calendar
- 12031 HE
- Japanese Calendar
- Heisei 43 (平成43年)
- Japanese Imperial Year
- Kōki 2691 (皇紀2691年)
- Chinese Sexagenary Cycle
- Yin Metal Pig (辛亥)
Milestones
- First human in space
- 70 years ago
- World War II ends
- 86 years ago
- Hindu-Arabic numerals introduced to Europe
- 829 years ago
- Mythical founding of Japan
- 2690 years ago
- Foundation of Rome
- 2783 years ago
- Beginning of Xia Dynasty in China
- 4131 years ago
- First Egyptian pyramid completed
- 4641 years ago
- End of the Paleolithic Period
- 12030 years ago