Week number
ISO 8601: weeks start on Monday; week 1 contains 4 January. The week year can differ from the calendar year.
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Week number
ISO 8601: weeks start on Monday; week 1 contains 4 January. The week year can differ from the calendar year.
How to use it
ISO 8601: weeks start on Monday; week 1 contains 4 January. The week year can differ from the calendar year.
Good to know
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