Konstantin Kivi <konst@sirena2000.ru> writes:
Time Zone Data v. 2011m (Released 24 October 2011) file contains a line
---------------------------------------------------------------------------------- Rule Russia 1993 2010 - Mar lastSun 2:00s 1:00 S ---------------------------------------------------------------------------------- which I believe means that last change to summer time was in 2010. This is incorrect, because this (2011) year we actually have changed time on last Sunday of March (by moving clock forward) I believe that for historical purposes the rule must looks as follows ---------------------------------------------------------------------------------- Rule Russia 1993 2011 - Mar lastSun 2:00s 1:00 S ----------------------------------------------------------------------------------
You have to look a bit lower, where the Zone description takes place. For example, Moscow contains the following: Zone Europe/Moscow 2:30:20 - LMT 1880 [...] 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK So on Mar 27, Moscow stopped observing ruleset Russia, and instead changed to permanent offset of +4:00. It's done this way, because permanent daylight saving is not really _saving_, it's simply a new zone. PM