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Purpose
Get ISO week number for a given date
Return value
A number between 1 and 54.
Syntax
=ISOWEEKNUM (date)
Arguments
- date – A valid Excel date in serial number format.
Usage notes
The ISOWEEKNUM function returns a week number based on ISO standards. Under this standard, weeks begin on Monday and the week number 1 is assigned to the first week in a year that contains a Thursday.
