Hi.
I am new to POSIX and I'd like to understand the reason of this difference.
dt1 = as.POSIXct("2014-03-29 09.00", format="%Y-%m-%d %H.%M")
dt2 = as.POSIXct("2014-03-30 09.00", format="%Y-%m-%d %H.%M")
dt2-dt1
> dt1[1] "2014-03-29 09:00:00 CET"> dt2[1] "2014-03-30 09:00:00 CEST"> dt2-dt1
Time difference of 23 hours
This is right, because on Mar 31 at 2 PM we jump directly to 3PM, DST.
On the contrary, I don't understand the following:
dt1 = as.POSIXct("2014-04-18 09.00", format="%Y-%m-%d %H.%M", tz = "CEST")
dt2 = as.POSIXct("2014-04-18 09.00", format="%Y-%m-%d %H.%M", tz = "GMT")
> dt1[1] "2014-04-18 09:00:00 CEST"> dt2[1] "2014-04-18 09:00:00 GMT">
> dt1-dt2Time difference of 0 secs
I should expected a time difference of 2 hours, as CEST is GMT+2.
Anyone can help me?
Thank you,
Nicola
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