TZ database content

Thomas Carey tcarey at
Fri Feb 9 17:36:39 UTC 2001

Srini - I have found it necessary to take exactly this approach, incorporating one "snapshot" of the TZ data into our product itself so that it would work properly everywhere. (our web application takes local time from the user's computer, but requires explicit (or implicit) selection of the timezone in effect for each entity to which a timezone applies.)

  ----- Original Message ----- 
  From: Srinivas Nagaraj 
  To: Time Zone Mailing List (E-mail) 
  Sent: Friday, February 09, 2001 9:02 AM
  Subject: TZ database content

  The TZ (zoneinfo) database comes installed with several operating 
  systems like Linux, Solaris, etc.  
  I have noticed the content of the TZ database varies between different 
  versions of the same operating system and also between operating 
  systems.  This could have been because of when a snapshot of the 
  TZ database was taken.  
  Ofcourse, one significant difference is the actual name of the time zone.  
  Depending on the content of the TZ database, the time zone name look 
  different.  Is it because the TZ database has evolved?  
  I also noticed that the file is not distributed on a number of 
  installations.  Was that operating system installation decision?
  Now my main question, is it an appropriate application specific common 
  practice to use an application specific TZ database?  That way the 
  time zone names can be consistent, irrespective of where the application 
  is installed?
  Thank you.
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