You can find the binary zone file at /usr/share/lib/zoneinfo, browse around, and you can use the directory and file name as reference with command below.
From here, if the isdst=0 means Daylight Saving Time is OFF, and if isdst=1 means Daylight
Saving Time is ON.
$ zdump -v Australia/West
Australia/West Mon Jan 27 11:09:51 2014 CUT
Australia/West Fri Dec 13 20:45:52 1901 GMT = Sat Dec 14 04:15:52 1901 CUT isdst=0 gmtoff = 27000
Australia/West Sat Dec 14 20:45:52 1901 GMT = Sun Dec 15 04:15:52 1901 CUT isdst=0 gmtoff = 27000
Australia/West Sat Oct 26 17:59:59 1974 GMT = Sun Oct 27 01:29:59 1974 CUT isdst=0 gmtoff = 27000
Australia/West Sat Oct 26 18:00:00 1974 GMT = Sun Oct 27 01:30:00 1974 CUT isdst=0 gmtoff = 27000
Australia/West Sat Mar 1 17:59:59 1975 GMT = Sun Mar 2 01:29:59 1975 CUT isdst=0 gmtoff = 27000
Australia/West Sat Mar 1 18:00:00 1975 GMT = Sun Mar 2 01:30:00 1975 CUT isdst=0 gmtoff = 27000
Australia/West Sat Oct 29 17:59:59 1983 GMT = Sun Oct 30 01:29:59 1983 CUT isdst=0 gmtoff = 27000
Australia/West Sat Oct 29 18:00:00 1983 GMT = Sun Oct 30 01:30:00 1983 CUT isdst=0 gmtoff = 27000
Australia/West Sat Mar 3 17:59:59 1984 GMT = Sun Mar 4 01:29:59 1984 CUT isdst=0 gmtoff = 27000
….
|
Am I using Daylight Saving Time (DST)?
We could say if the time zone variable ends in DT (or in
our case DFT), DST is enabled.
|
$ grep -i /etc/environment # or
$ echo $TZ
TZ=NFT-1DFT-2,M3.5.0,M10.5.0
# DST is used
TZ=CUT # DST is not used |
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