The precidency of Nicaragua has emitted a decree 63-2006 about end of DST which means that according to my time and that of Steffen Thorsen, the change will occur an hour earlier at 1:00 (we had 2:00), but an hour later according to the 2006l tz database, which has the change to occur 0:00 at the moment. http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-P RN-Cambio-Hora.pdf My informal translation runs: The natural sun time is restored in all the national territory, in that the time is returned one hour at 01:00 am of October 1 of 2006. This probably means that the rule should be split from Rule Nic 2005 2006 - Oct Sun>=1 0:00 0 S to Rule Nic 2005 only - Oct Sun>=1 0:00 0 S Rule Nic 2006 only - Oct Sun>=1 1:00 0 S Regards, - Jesper Jesper Nørgaard Welen Email: jnorgard@Prodigy.Net.mx Project Leader (Líder de Proyecto) Software CIMMYT - Centro Internacional de Mejoramiento de Maíz y Trigo Dirección: CIMMYT Int. c/o Jesper Nørgaard Km. 45, Carretera México-Veracruz El Batán Texcoco, Edo. de México CP 56130 MEXICO Tel.: +52 (55) 58-04-20-04 ext. 1374 Fax: +52 (55) 58-04-75-58 Tel. Casa: 53-10-05-95 ó 53-10-97-78 Download the shareware program World Time Explorer, I made: http://www.worldtimeexplorer.com/index.html