:type 'number
:group 'calendar)
-(defcustom diary-sabbath-candles-minutes 18
- "Number of minutes before sunset for sabbath candle lighting."
- :group 'diary
- :type 'integer
- :version "21.1")
-
-
;;; End of user options.
(solar-setup))
(solar-sunrise-sunset-string date))
-;; To be called from list-sexp-diary-entries, where DATE is bound.
-;;;###diary-autoload
-(defun diary-sabbath-candles (&optional mark)
- "Local time of candle lighting diary entry--applies if date is a Friday.
-No diary entry if there is no sunset on that date.
-
-An optional parameter MARK specifies a face or single-character string to
-use when highlighting the day in the calendar."
- (or (and calendar-latitude calendar-longitude calendar-time-zone)
- (solar-setup))
- (if (= (% (calendar-absolute-from-gregorian date) 7) 5) ; Friday
- (let* ((sunset (cadr (solar-sunrise-sunset date)))
- (light (if sunset
- (cons (- (car sunset)
- (/ diary-sabbath-candles-minutes 60.0))
- (cdr sunset)))))
- (if sunset
- (cons mark
- (format "%s Sabbath candle lighting"
- (apply 'solar-time-string light)))))))
-
;; From Meeus, 1991, page 167.
(defconst solar-seasons-data
'((485 324.96 1934.136)