Hi Guys, It looks like the announcment of 2013-B has Chile going from GMT-3 to GMT-4 on April 23rd and the opposite on Sep 2nd. However, the correct dates are April 28th and Sep 7th. An official source for this stuff in Chile is the Navy's "Hora Oficial" website: http://www.horaoficial.cl/cambio.htm All the best, Carlos