Hello All,
I'm using a UDF to get from a yyyyww notation to a real date. I take the yyyy value from a cell, use it in ISOYEARSTART and then add 7 times the number of weeks from the same cell
=IFERROR(IF(A3=0;"";ISOYEARSTART(LEFT(A3;4))+7*RIGHT(A3;2))+5;"")
I add 5 days, to end up on a friday...