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Date and Time - ISOWEEKNUM Function
Description
The ISOWEEKNUM function returns number of the ISO week number of the year for a given date.
Syntax
ISOWEEKNUM (date)
Arguments
| Argument | Description | Required/ Optional |
|---|---|---|
| Date | Date is the date-time code used by Excel for date and time calculation. | Required |
Notes
Microsoft Excel stores dates as sequential numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900.
If the date argument is not a valid number, ISOWEEKNUM returns the #NUM! error value.
If the date argument is not a valid date type, ISOWEEKNUM returns the #VALUE! error value.
Applicability
Excel 2013, Excel 2016
Example
advanced_excel_date_time_functions.htm
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