#QUESTION# Is there a way to calculate the offset between timezones, e.g. from "AST" to "GMT"?
#DETAILS# I am working with data files that use local time, and that indicate the timezone by e.g. "AST" (Atlantic Standard Time, my local time) in a header. I was guessing that > ISOdatetime(2008,1,1,1,0,0,tz="GMT") - > ISOdatetime(2008,1,1,1,0,0,tz="AST") would work, but it gives a difference of 0. However, when I do > ISOdatetime(2008,1,1,1,0,0,tz="GMT") - ISOdatetime(2008,1,1,1,0,0) I get a -4h offset, which is correct. The odd thing is, I am in AST time, as shown by the following. > ISOdatetime(2008,1,1,1,0,0) [1] "2008-01-01 01:00:00 AST" #SYSTEM# Mac OS X system, with R 2.6.1 #PS# I am aware that this sort of thing is system dependent, and so there may not be a general solution. But even if I can only get it working on my own particular system, I'd be happy! -- View this message in context: http://www.nabble.com/how-to-calculate-time-offset-between-timezones--tp14736453p14736453.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
