I have a table with a Date column that has the beginning of each (U.S.A) work week, which starts on a Monday, like 7/2/2018, 7/9/2018, 7/16/2018, etc. In another table I have a list of U.S.A Holidays, for example 7/4/2018 (Independence Day), 9/3/2018 (Labor Day). I would like a custom column...