In 2006o, a number of changes were implemented in the tz database for Chile and Easter Island and the Palmer station. One of the changes follows here: - -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time + -7:00 Chile EAS%sT 1982 Jan 18 21:00 # Easter I Time This was based on my data sent earlier, that origins from the page http://www.horaoficial.htm where it says (my translation) * By Supreme Decree No. 61, of 19.th. of January, the decree No. 1.142 of 20.th. October 1980 is modified, assigning the time GMT-6 to the Easter Islands and Salas and Gómez, this way there will be a permanent difference of 2 hours between the Chile mainland and these islands. However, in those times most decrees were issued much before the actual changes took place and I think this would also be the case here. Checking www.astro.com with Mataveri, it shows Easter Island on "6 h west, Daylight Time" on 12.th. of March 1982, but on "6 h west, Standard Time" on 14.th. of March 1982" in my interpretation GMT-6 in both cases, but the first while being on DST. My recommendation is therefore simply to revert this change, and setting the transition time back to 13.th. of March 1982 at 21:00. 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