Hi all, First, let me thank to all of you for your excellent work maintaining the time zone database. I'm user of several programs using your database as source and I want to add a new time zone for San Luis, Argentina because currently we are using a different time zone that all the rest of the country. This is the link for the local law (spanish) that define the new time zone: http://ministerios.sanluis.gov.ar/res/media/pdf/18459.doc Basically the law says: 1) We will use the time zone GMT-3 from the 0 hour from the second Sunday of October to the 24 hours of the secong Saturday of April. 2) We will use the time zone GMT-4 from the 0 hour from the second Sunday of April to the 24 hours of the secong Saturday of October. I hope this can help you to include these changes in your database to be able to select the correct time zone for my State. Thanks, Norberto Nazabal