date:week-in-year

Returns the week of the year as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used as the default argument.

week-in-year($date-time as string?) ➔ number

Arguments
	$date-time	string?	The input date/time
Result		number

Namespace

http://exslt.org/dates-and-times

Links to specifications

EXSLT Dates and Times Module

Details

For the purposes of numbering, counting follows ISO 8601: week 1 in a year is the week containing the first Thursday of the year, with new weeks beginning on a Monday.