Table.AddColumn(
EnterPreviousStepNameHere, "YYWW", each
[ShortYear] & Text.PadStart( Text.From([Week Number]), 2, "0"),
type text
)
Also you need to add 1 day to the DayCount parameter with this version, as illustrated below. DayCount = Duration.Days(Duration.From(EndDate - StartDate)) +1
Final note, if you need a ISO-8601 date table, I suggest you make the switch to this one: