Day of the week Calculator
Calculation of the Day of the week: Enter or set a date and the day of the week for this date will be shown according to the Gregorian calendar. In China the calendar is standard since 1929, Japan uses the calender from 1873, and Korea since 1896. This calendar is used in the UK since 14 September 1752 until now.
Pope Gregory XIII left out ten days because the calendar was in delay in comparison to the course of the year. The reform was a daring step for him and an ambitious goal for the world. It took centuries until all regions of the world followed.
The Gregorian calendar adjusts the difference to the solar year by adding more leap days. It was introduced initially in continental Europe. The first valid date is 15th October 1582. The Julian calendar, which was used before, showed a divergence of ten days to the solar year (the duration the earth turns around the sun).
The Julian as well as the Gregorian calendar start from the premise that the year one is the first year after the birth of Christ, i.e. the first year anno domini. This means that the third millennium has started on New Year 2001.
Here you will find information about calculating the day of the week for a date that you have chosen. The day of the week is based on the Gregorian calendar. The algorithm is based on the everlasting calendar from Theodor Wagner. (US/NA).
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