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Week Number Calculator

Pick any date and the calculator shows its ISO-8601 week number (weeks start on Monday, and week 1 is the week with the first Thursday of the year) plus the day of the week.

\u2014ISO week number
\u2014Day of the week

How to use

  1. Pick a date.
  2. Click Calculate.
  3. Read the week number and the weekday.

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