I work at my 2nd job Tuesday, Wednesday, and Thursday every week, and they run their twice monthly payroll on the 10th and the 25th. I am required to look ahead on a Thursday to see if the 10th or the 25th fall over the period I'm not at work to see if I need to fill out my payroll report and submit it to the payroll department. If you had a, "last/before" relative date it would be very useful. The logic would go something like this: the last Thursday before the 10th and the 25th, then I would enter a task for myself at 9:15 in the evening to print my payroll report, set an alert for it, and never miss entering my payroll report and not have to worry about it.
Thanks,
Jefferson M.