calendar-mark-complex
calendar-mark-complex is a compiled Lisp function in `diary-lib.el
'.
(calendar-mark-complex MONTH DAY YEAR FROMABS &optional COLOR)
Mark dates in the calendar conforming to MONTH DAY YEAR of some system.
The function FROMABS converts absolute dates to the appropriate date system.
Optional argument COLOR is passed to `calendar-mark-visible-date' as MARK.