Start Of Week

Thanks for the replies.

v-lid-msft Your information is helpful but not for this particular problem.  In addition to setting Monday to the start of the week, I need to filter on the last 12 weeks.  I need relative date filtering which I cannot do on an integer. 

I created a start of week date column in my date table that sets Monday to the start of the week: 

SoW = Dates[Date] - WEEKDAY(Dates[Date],2) + 1

After that, I used my SoW column in the date filter:

However, the filter still shows 7/14 (Sunday) to 10/5 (Saturday) and not 7/15 to 10/6 like I would prefer. Internally, Power BI is still recognizing Sunday as the start of the week. That's why I was hoping PBI had something like Tableau where I can tell Tableau Desktop / the data source that Monday is the start of the week and filters would reflect that.  

The good news is despite the incorrect dates being displayed in the filter, I am getting the values I expected.  I was worried that for the week of 9/30 (Monday) values for 10/6 (Sunday) would be excluded due to the filter showing 7/14/19-10/5/19.