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- 400s (decade)The 400s decade ran from January 1, 400, to December 31, 409.
- 410sThe 410s decade ran from January 1, 410, to December 31, 419.
- 420sThe 420s decade ran from January 1, 420, to December 31, 429.
- 430sThe 430s decade ran from January 1, 430, to December 31, 439.
- 440sThe 440s decade ran from January 1, 440, to December 31, 449.
- 450sThe 450s decade ran from January 1, 450, to December 31, 459.
- 460sThe 460s decade ran from January 1, 460, to December 31, 469.
- 470sThe 470s decade ran from January 1, 470, to December 31, 479.
- 4th millennium BCMillennium between 4000 BC and 3001 BC
- 5th centuryOne hundred years, from 401 to 500