| Millennium: | 1st millennium |
| Centuries: | 1st century BC – 1st century – 2nd century |
| Decades: | 0s BC 0s 10s – 20s – 30s 40s 50s |
| Years: | 20 21 22 23 24 25 26 27 28 29 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
- Note: Sometimes the '20s is used as shorthand for the 1920s, the 1820s, or other such decades in various centuries – see List of decades
The 20s decade ran from January 1, 20, to December 31, 29. It was the third decade in the Anno Domini/Common Era, if the nine-year period from 1 AD to 9 AD is considered as a "decade".
Events and trends
Significant people
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