http://www.presidencia.gub.uy/_web/decretos/2006/09/09_2006.htm Uruguay's DST will be more regular from now on until otherwise decreed. It will be scheduled to start the first Sunday of October, 02:00am ending the second Sunday of March, 02:00am. tzdata for the file southamerica should refect this change: Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - -- Regards, Mauricio Campiglia /* Tantas ventanas y tan poco tiempo... */