I have this spreadsheet that is format as follows: B5:AF5 represents the days in the month (1-31). B7:AF30 are the areas for login certain information divided by days of the month. Cell AA3 has the month, and cell AE3 has the year. What I want is for all sundays of the month to be fill colored in gray based on the month and year entered in cells AA3 and AE3. Can this be done ?