Function: calendar-mayan-tzolkin-difference

calendar-mayan-tzolkin-difference is a byte-compiled function defined in cal-mayan.el.gz.

Signature

(calendar-mayan-tzolkin-difference DATE1 DATE2)

Documentation

Number of days from Mayan tzolkin DATE1 to next occurrence of tzolkin DATE2.

Source Code

;; Defined in /usr/src/emacs/lisp/calendar/cal-mayan.el.gz
(defun calendar-mayan-tzolkin-difference (date1 date2)
  "Number of days from Mayan tzolkin DATE1 to next occurrence of tzolkin DATE2."
  (let ((number-difference (- (car date2) (car date1)))
        (name-difference (- (cdr date2) (cdr date1))))
    (mod (+ number-difference
            (* 13 (mod (* 3 (- number-difference name-difference))
                       20)))
         260)))