Returns the date that is the number of months before or after the given starting date in the user preferred calendar.
useredate( start_date, months )
start_date: (Date) The starting date.
months: (Number) The number of months to offset, where negative is before starting_date and positive is after start_date.
You can copy and paste these examples into the Expression Rule Designer to see how this works.
useredate(11/20/2006, -6) returns