From 98d7b650aa611a0de537ace581cde47c66071af3 Mon Sep 17 00:00:00 2001 From: "Kevin M. Rosenberg" Date: Mon, 5 Jan 2004 02:07:35 +0000 Subject: [PATCH] r8490: add dst info --- datetime.lisp | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/datetime.lisp b/datetime.lisp index 771d75a..4a4dbe2 100644 --- a/datetime.lisp +++ b/datetime.lisp @@ -68,3 +68,36 @@ (t (format t "~,2F ~A" val unit)))) + +;;;; Daylight Saving Time calculations + +;; Daylight Saving Time begins for most of the United States at 2 +;; a.m. on the first Sunday of April. Time reverts to standard time at +;; 2 a.m. on the last Sunday of October. In the U.S., each time zone +;; switches at a different time. + +;; In the European Union, Summer Time begins and ends at 1 am +;; Universal Time (Greenwich Mean Time). It starts the last Sunday in +;; March, and ends the last Sunday in October. In the EU, all time +;; zones change at the same moment. + +;; Spring forward, Fall back +;; During DST, clocks are turned forward an hour, effectively moving +;; an hour of daylight from the morning to the evening. + +;; United States European Union + +;; Year DST Begins DST Ends Summertime Summertime +;; at 2 a.m. at 2 a.m. period begins period ends +;; at 1 a.m. UT at 1 a.m. UT +;; ---------------------------------------------------------- +;; 2000 April 2 October 29 March 26 October 29 +;; 2001 April 1 October 28 March 25 October 28 +;; 2002 April 7 October 27 March 31 October 27 +;; 2003 April 6 October 26 March 30 October 26 +;; 2004 April 4 October 31 March 28 October 31 +;; 2005 April 3 October 30 March 27 October 30 +;; 2006 April 2 October 29 March 26 October 29 +;; 2007 April 1 October 28 March 25 October 28 +;; 2008 April 6 October 26 March 30 October 26 + -- 2.34.1