Forcing data in a related column

I have the following report table which relates a flattened table of data to a calendar table, related by Entry Date from the report data.  I am trying to highlight the table rows when it is a weekend.  I have created IsWknd in both the date table and the data table, however if there is no entry made for that date, the weeknumber is not shown.  Is there a way to still get the weekday number even if there is no data for that date in the report data?  This report is filtered by slicers for year and month and then displays all of the days within the selected month.

Thanks for the information