Hi Jon Sproule,
according to the Workflow Expression Parser Documentation, you can use
DatePart(Interval, DateTime, [FirstDayOfWeek], [FirstWeekOfYear]) for this.
Example:
GV_MyDateTime = 26.04.2022 11:30
DatePart("ww", GV_MyDateTime)
Returns: 18
Hope this helps.
Greetings from Germany,
Simon H. Hellmann
DocuWare System Consultant