The page of the San Luis provincial government http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 confirms what Alex Krivenyshev has earlier sent to the tz emailing list about that San Luis plans to return to standard time much earlier than the rest of the country. It also confirms that upon request the provinces San Juan and Mendoza refused to follow San Luis in this change. The change is supposed to take place Monday the 21.st at 0:00 hours. As far as I understand it if this goes ahead, we need a new timezone for San Luis (although there are also documented independent changes in the southamerica file of San Luis in 1990 and 1991 which has not been confirmed). I think I will not act on this for World Time Explorer until we get a confirmation Monday that it actually happened, since we have seen too many times before Argentina time changes to be announced and then not carried out. Still a message like this on the official regional government website from the Vice Governor of San Luis, Dr. Jorge Luis Pellegrini looks as close to an official document as it can possibly get. Of course any comments on this are most welcome. Mariano Absatz, living in Argentina, do you have any more information? Regards, - Jesper Nørgaard Welen