What happened in 421
2 entries recorded for 421, listed by date. That was 1605 years ago.
421 at a glance
- Years ago
- 1605 (as of 2026)
- Century
- 5th century
- Decade
- 420s
- Generation born
- Before the named generations
- Entries here
- 2
- Breakdown
- 2 historical events
February
- February 8
Honorius
Honorius declared Constantius III to be his co-emperor of the Western Roman Empire.
June
- June 7
Theodosius II
Roman emperor Theodosius II married Aelia Eudocia, who later helped to protect Greek pagans and Jews from persecution.
Questions about 421
What happened in 421?
This site records 2 entries for 421, including Honorius on February 8. They are listed below by date.
How long ago was 421?
1605 years ago, counting from 2026. Anyone born in 421 turns 1605 this year.
Which century is 421 in?
421 falls in the 5th century, in the 420s.
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