You could also do it without server using a formula tool and a filter tool. I would use the following formulas...
DateTimeNow() to get today's date (This column is named "Date").
DateTimeFormat([Date],"%A") to get the day of the week. (This column is named "Day").
After the formula tool add a filter tool that says if [Day] = "Monday" (or whatever day you want). Then, add your email tool. That should do it.