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Day of Week

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Day of Week diagram
This calc provides the day of the week for any date in the modern (Gregorian) calendar (i.e. only from 1752 in the UK and its then-territories), providing for all the intricasies of leap years.
Year (yyyy)
Month (mm)
Day (dd)

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Leap years occur in years that divide by 4, unless they divide by 100 (and these unless they divide by 400). So 1900 was not a leap year and 21000 will also not be, while 2000 and 2004 were.
Enter the year, month, and day numerically. The calc will accept nonsensical values, but we offer no interpretation as to the meaning of the result!
In 1752, the British Empire skipped 11 days in their calendar to bring it into line with the Gregorian calendar. Thus, earlier dates in the British calendar can not be calculated here.