Day of Week Calculator

Find out what day of the week any date falls on

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Quick Examples

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Day of Week Facts:

• The Gregorian calendar repeats every 400 years
• There are exactly 20,871 weeks in 400 years
• The same date can fall on different days in consecutive years
• Leap years occur every 4 years (with some exceptions)
• The calendar was reformed in 1582 by Pope Gregory XIII