CODEWITHSUNDEEP
macosshelldatetimezone
jotzet79
jotzet79

Reputation: 1

Wrong TimeZone Calculation in macOS bash?

When I do the following in macOS bash it returns the wrong Time Zone Information

Conversely in bash on Debian Linux

Anybody else experienced such timezone conversion bugs (+0900 versus +1000)? IMHO back in 2014 the timezone setting for Russia was still UTC+10 (according to https://en.wikipedia.org/wiki/Yakutsk_Time)

Thanks for thoughts / hints, J

PS: After @KamilCuk 's hint,

Output on Linux

Asia/Yakutsk  Fri Dec 13 20:45:52 1901 UT = Sat Dec 14 05:24:50 1901 LMT isdst=0 gmtoff=31138
Asia/Yakutsk  Sat Dec 14 20:45:52 1901 UT = Sun Dec 15 05:24:50 1901 LMT isdst=0 gmtoff=31138
Asia/Yakutsk  Sat Mar 27 16:59:59 2010 UT = Sun Mar 28 01:59:59 2010 +09 isdst=0 gmtoff=32400
Asia/Yakutsk  Sat Mar 27 17:00:00 2010 UT = Sun Mar 28 03:00:00 2010 +10 isdst=1 gmtoff=36000
Asia/Yakutsk  Sat Oct 30 16:59:59 2010 UT = Sun Oct 31 02:59:59 2010 +10 isdst=1 gmtoff=36000
Asia/Yakutsk  Sat Oct 30 17:00:00 2010 UT = Sun Oct 31 02:00:00 2010 +09 isdst=0 gmtoff=32400
Asia/Yakutsk  Sat Mar 26 16:59:59 2011 UT = Sun Mar 27 01:59:59 2011 +09 isdst=0 gmtoff=32400
Asia/Yakutsk  Sat Mar 26 17:00:00 2011 UT = Sun Mar 27 03:00:00 2011 +10 isdst=0 gmtoff=36000
Asia/Yakutsk  Sat Oct 25 15:59:59 2014 UT = Sun Oct 26 01:59:59 2014 +10 isdst=0 gmtoff=36000
Asia/Yakutsk  Sat Oct 25 16:00:00 2014 UT = Sun Oct 26 01:00:00 2014 +09 isdst=0 gmtoff=32400
Asia/Yakutsk  Mon Jan 18 03:14:07 2038 UT = Mon Jan 18 12:14:07 2038 +09 isdst=0 gmtoff=32400
Asia/Yakutsk  Tue Jan 19 03:14:07 2038 UT = Tue Jan 19 12:14:07 2038 +09 isdst=0 gmtoff=32400

Output on macOS

.
.
Asia/Yakutsk  Sat Oct 30 17:00:00 1999 UTC = Sun Oct 31 02:00:00 1999 +09 isdst=0
Asia/Yakutsk  Sat Mar 25 16:59:59 2000 UTC = Sun Mar 26 01:59:59 2000 +09 isdst=0
Asia/Yakutsk  Sat Mar 25 17:00:00 2000 UTC = Sun Mar 26 03:00:00 2000 +10 isdst=1
Asia/Yakutsk  Sat Oct 28 16:59:59 2000 UTC = Sun Oct 29 02:59:59 2000 +10 isdst=1
Asia/Yakutsk  Sat Oct 28 17:00:00 2000 UTC = Sun Oct 29 02:00:00 2000 +09 isdst=0
.
.
Asia/Yakutsk  Sat Mar 24 16:59:59 2007 UTC = Sun Mar 25 01:59:59 2007 +09 isdst=0
Asia/Yakutsk  Sat Mar 24 17:00:00 2007 UTC = Sun Mar 25 03:00:00 2007 +10 isdst=1
Asia/Yakutsk  Sat Oct 27 16:59:59 2007 UTC = Sun Oct 28 02:59:59 2007 +10 isdst=1
Asia/Yakutsk  Sat Oct 27 17:00:00 2007 UTC = Sun Oct 28 02:00:00 2007 +09 isdst=0
Asia/Yakutsk  Sat Mar 29 16:59:59 2008 UTC = Sun Mar 30 01:59:59 2008 +09 isdst=0
Asia/Yakutsk  Sat Mar 29 17:00:00 2008 UTC = Sun Mar 30 03:00:00 2008 +10 isdst=1
Asia/Yakutsk  Sat Oct 25 16:59:59 2008 UTC = Sun Oct 26 02:59:59 2008 +10 isdst=1
Asia/Yakutsk  Sat Oct 25 17:00:00 2008 UTC = Sun Oct 26 02:00:00 2008 +09 isdst=0
Asia/Yakutsk  Sat Mar 28 16:59:59 2009 UTC = Sun Mar 29 01:59:59 2009 +09 isdst=0
Asia/Yakutsk  Sat Mar 28 17:00:00 2009 UTC = Sun Mar 29 03:00:00 2009 +10 isdst=1
Asia/Yakutsk  Sat Oct 24 16:59:59 2009 UTC = Sun Oct 25 02:59:59 2009 +10 isdst=1
Asia/Yakutsk  Sat Oct 24 17:00:00 2009 UTC = Sun Oct 25 02:00:00 2009 +09 isdst=0
Asia/Yakutsk  Mon Jan 18 03:14:07 2038 UTC = Mon Jan 18 12:14:07 2038 +09 isdst=0
Asia/Yakutsk  Tue Jan 19 03:14:07 2038 UTC = Tue Jan 19 12:14:07 2038 +09 isdst=0

Upvotes: 0

Views: 488

Answers (1)

KamilCuk
KamilCuk

Reputation: 141190

Output on macOS

Asia/Yakutsk  Sat Oct 24 17:00:00 2009 UTC = Sun Oct 25 02:00:00 2009 +09 isdst=0
Asia/Yakutsk  Mon Jan 18 03:14:07 2038 UTC = Mon Jan 18 12:14:07 2038 +09 isdst=0

Your macos timezone information is outdated or invalid. Possible cause is that your system is outdated and you should update your tzdata package.

A 5 min search on google shows me multiple links on how to manually update tzdata database on MacOS. If a route of some "system update" is not available, then manually compile and install tzdata for /usr/share/zoneinfo/Asia/Yakutsk.

Upvotes: 1

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