calendar-mark-month

calendar-mark-month is a compiled Lisp function in `diary-lib.el'.

(calendar-mark-month MONTH YEAR P-MONTH P-DAY P-YEAR &optional COLOR)

Mark dates in the MONTH/YEAR that conform to pattern P-MONTH/P-DAY/P-YEAR.
A value of 0 in any position of the pattern is a wildcard.
Optional argument COLOR is passed to `calendar-mark-visible-date' as MARK.