Variable: calendar-daylight-savings-starts

calendar-daylight-savings-starts is a customizable variable defined in cal-dst.el.gz.

Value

(calendar-dst-starts year)

Documentation

Sexp giving the date on which daylight saving time starts.

This is an expression in the variable year whose value gives the Gregorian date in the form (month day year) on which daylight saving time starts. It is used to determine the starting date of daylight saving time for the holiday list and for correcting times of day in the solar and lunar calculations.

For example, if daylight saving time is mandated to start on October 1, you would set calendar-daylight-savings-starts to

      (10 1 year)

If it starts on the first Sunday in April, you would set it to

      (calendar-nth-named-day 1 0 4 year)

If the locale never uses daylight saving time, set this to nil.

View in manual

Source Code

;; Defined in /usr/src/emacs/lisp/calendar/cal-dst.el.gz
(defcustom calendar-daylight-savings-starts '(calendar-dst-starts year)
  "Sexp giving the date on which daylight saving time starts.
This is an expression in the variable `year' whose value gives the Gregorian
date in the form (month day year) on which daylight saving time starts.  It is
used to determine the starting date of daylight saving time for the holiday
list and for correcting times of day in the solar and lunar calculations.

For example, if daylight saving time is mandated to start on October 1,
you would set `calendar-daylight-savings-starts' to

      (10 1 year)

If it starts on the first Sunday in April, you would set it to

      (calendar-nth-named-day 1 0 4 year)

If the locale never uses daylight saving time, set this to nil."
  :type 'sexp
  :group 'calendar-dst)