400

Millennium:	1st millennium
Centuries:	3rd century – 4th century – 5th century
Decades:	370s  380s  390s  – 400s –  410s  420s  430s
Years:	397 398 399 – 400 – 401 402 403

400 Media

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  The Eastern Hemisphere in 400

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  EuropaAD

400 (CD) was a leap year starting on Sunday of the Julian calendar, the 400th year of the Common Era (CE) and Anno Domini (AD) designations, the 400th year of the 1st millennium, the 100th and last year of the 4th century, and the 1st year of the 400s decade. As of the start of 400, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Events

• First invasion of Italy by Alaric (probable date).
• The Vandals start their westward trek from Dacia and Hungary (approximate date).
• Construction (and therefore occupation) at Great Zimbabwe begins (approximate date).
• Earliest date of human occupation on Easter Island (approximate date).
• Chrysanthemums are introduced to Japan (approximate date).