Week to date Calculation group

[sublog]

Trying to figure out the syntax for a week-to-date measure based on Sunday being the first day of the week. 

Does anyone have anything that could point me in the right direction? 

Here is what I have done for MTD:

CALCULATE ( SELECTEDMEASURE (), CALCULATETABLE ( DATESMTD ( 'Calendar'[Date] ), 'Calendar'[IsPast] = TRUE () ) )

[themistoklis]

@sublog 

I think you can find the answer in the following link:

https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-La...

For Sunday being the first day make sure in the weekday formula to put the number 1 (as return type).

e.g. WEEKDAY('Date'[Date],1)