As you may know, the time zone change to DST time in Argentina was not realized last sunday October 18th. Even though the file southamerica file in current tzdata compilation is right, the DST change in my country is only taken yearly under a political presidential decreet (per decreet basis). I hope this information becomes usefull for you. Regards, Jorge Veiga Telefónica de Argentina * mailto:veigaj@telefonica.com.ar