6th millennium

Millennia:	5th millennium 6th millennium 7th millennium
Centuries:	51st century 52nd century 53rd century 54th century 55th century 56th century 57th century 58th century 59th century 60th century

The sixth millennium of the Gregorian calendar will begin on January 1, 5001, and end on December 31, 6000. It will be the sixth millennium in the Anno Domini or Common Era.

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Wikipedia