Ron van Herk

An alternative option to calculate week numbers is the use of the ElapsedWeeks function, this seems to be more easy if you want to get week numbers from a full year. For 2019 week 1 started on December 30, by using the elapsed weeks since this date the week number can be calculated as follows: Round(ElapsedWeeks("<Your Date Field>", Date('2018-12-30')) + 0.5, 0)