Posix Timezone format

Louis Guindon Louis_Guindon at pmc-sierra.com
Thu Nov 13 23:05:25 UTC 2008

Hi All,


My goal is to provide a user interface showing the information derived
from the TZ zone name. Based on the selected TZ zone name by the user, I
will assign the corresponding POSIX time zone string to the Linux
/tmp/TZ file. This way the local time will show up properly for the


However, I am having difficulty to find a reliable source for POSIX time
zone string representation for each defined time zone in the Olson
database. Also, the Olson database is changing many times a year which
is making it difficult to hardcode anything in advance. 


I am sure that my problem already encountered by someone on this mailing
list and I am wandering if there is a way to query the current version
of the Olson database with some tool to return the related POSIX
representation for the requested time zone.


I don't know if there is an alternative way, but I am also wandering if
the TZ time zone name can used directly without going through the POSIX
representation of the time zone.


Note: POSIX time zone representation for me is the following. The TZ
zone name America/Los_angeles is represented as PST8PDT,M3.2.0,M11.1.0.




Louis Guindon


Senior System Design Engineer


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