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Day of the week

Find the weekday, day of year, ISO week and number of occurrences of that weekday.

Get started

  1. Use the example values or enter your own measurements.
  2. Calculate, then copy the result or download the available details.

Example

Input

2000-01-01

Expected result

Saturday

Try it

Good to know

The calculation runs in your browser. Use consistent units in fields with no explicit unit.

Calculation method

The calendar is Gregorian. ISO weeks start on Monday. Week 1 contains January 4, so early January may belong to the last ISO week of the preceding year.