Our Formula Function Reference
Formula Function Reference
PrevDayOfWeek - Dates
(Date d, Number n)
Returns the last day before the given date d that falls on the weekday n. n is a number from 0 to 6 with Sunday being 0, Monday being 1, Tuesday being 2, and so on.
PrevDayOfWeek([Date Due], 5) returns the date of the last Friday that occurse before the Date Due.