DAX Creating Calendar Table With Additional Field - powerbi

Question

I'm creating a calendar table in DAX:
Dates =
CALENDAR (
MIN ( 'Work Weeks'[Start Date].[Date] ),
MAX ( 'Work Weeks'[Start Date].[Date] )
)
The work weeks table contains a week number and a start date for each week.
For each date in my new Dates table, I want to assign a work week number using the start date of the work week. Note that work weeks start on different days of the week (they're assigned properly in my work weeks table though).
So what I'm trying is:
Dates =
ADDCOLUMNS (
CALENDAR (
MIN ( 'Work Weeks'[Start Date].[Date] ),
MAX ( 'Work Weeks'[Start Date].[Date] )
),
"Work Week",
CALCULATE (
MAX ( 'Work Weeks'[Start Date].[Date] ),
'Work Weeks'[Start Date] <= Date
)
)
I'm not sure how to reference the current row/date in the condition at the end. And then I also need to return the work week number, rather than just the start date.

Answer 1

Assuming your work week table looks something like this:
You can use this date table code to add the week number:
Date Table =
VAR ListOfDate =
VAR MinDate = MIN ( Sales[Order Date] ) -- Replace the reference with the column of your model
VAR MaxDate = MAX ( Sales[Order Date] ) -- Replace the reference with the column of your model
VAR StartDate = DATE ( 2021, 1, 1 ) -- DATE ( YEAR ( MinDate ), 1, 1 )
VAR EndDate = DATE ( 2021, 12, 31 ) -- DATE ( YEAR ( MaxDate ), 12, 31 )
VAR Result = CALENDAR ( StartDate, EndDate )
RETURN
Result
VAR WorkWeekTable = ALL ( WorkWeek )
VAR CalendarTable =
GENERATE (
ListOfDate,
VAR CurrentDate = [Date]
RETURN
ROW (
"Calendar Year Number", YEAR ( CurrentDate ),
"Calendar Month Number", MONTH ( CurrentDate ),
"Work week",
CALCULATE (
MIN ( WorkWeek[Work Week Number] ),
CurrentDate >= WorkWeek[Work Week Start Date],
CurrentDate <= WorkWeek[Work Week End Date],
REMOVEFILTERS ( )
)
)
)
RETURN
CalendarTable
The result will look like this: