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ISOWEEKNUM function

Returns the ISO week number of the year (weeks start on Monday, week 1 contains the first Thursday).

Syntax

=ISOWEEKNUM(date)

Arguments

ArgumentRequiredDescription
dateRequiredThe date

How to use ISOWEEKNUM

ISOWEEKNUM takes 1 required argument. Type =ISOWEEKNUM( in a cell and SheetsBat shows the arguments as you go. Optional arguments are shown in square brackets; leave them out to use their default.

Examples

Each result below was calculated by the SheetsBat formula engine.

=ISOWEEKNUM(DATE(2012,3,9))Result 10
=ISOWEEKNUM(DATE(2021,1,1))Result 53

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