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This airticle is aboot the year 1640.
Millennium: 2nt millennium
Centuries: 16t century17t century18t century
Decades: 1610s  1620s  1630s  – 1640s –  1650s  1660s  1670s
Years: 1637 1638 163916401641 1642 1643

1640 (MDCXL) wis a leap year stairtin on Sunday o the Gregorian calendar (dominical letter AG), the 1640t year o the Common Era (CE) an Anno Domini (AD) designations, the 640t year o the 2nt millennium, the 40t year o the 17t century, an the 1st year o the 1640s decade atween 1583 an 1929 an wi Julian Value: 1640 is 10 calendar days difference, which continued tae be uised till the complete conversion o the Gregorian calendar wis entirely duin in 1929.