If I understand correctly, the patch translates as UTC -4 being the no-DST timezone for Chile until 25 April 2015; right?.

If so, the patch it's OK; as long as it's possible to change the start date for this (in case the decrees changes the definition of 'Hora Oficial' instead of just derogating DST)

On Wed, Jan 28, 2015 at 3:57 PM, Paul Eggert <eggert@cs.ucla.edu> wrote:

Thanks for the heads-up. Attached is a proposed patch to deal with this. I realize that the decree isn't official yet, but Chile's April change appears to be more likely than not, and we can always issue a new tz release if it turns out that we guessed wrong.

I would like to release a new tz version by tomorrow, because of the Quintana Roo situation.

Juan Correa Poblete
PS Labs (http://www.pslabs.cl)
+56-9-99193873