FW: "Etc\GMT" positive and negative

Olson, Arthur David (NIH/NCI) [E] olsona at dc37a.nci.nih.gov
Tue Feb 1 17:27:15 UTC 2011

-----Original Message-----
From: Olson, Arthur David (NIH/NCI) [E] 
Sent: Tuesday, February 01, 2011 12:26
To: 'tz at elsie.nci.nh.gov'
Cc: 'Exis.rdiaz at iberia.es'
Subject: FW: "Etc\GMT" positive and negative

I'm forwarding this message from Rodrigo Díaz López, who is not on the time one mailing list. Those of you who are on the list, please direct replies appropriately.


From: EXIS.Diaz Lopez, Rodrigo [mailto:EXIS.rdiaz at iberia.es] 
Sent: Tuesday, February 01, 2011 12:25
To: tz at elsie.nci.nih.gov
Subject: "Etc\GMT" positive and negative


I think I found a bug with the "Etc\GMT" zones.

If you use a "positive zone" like Etc\GMT+2 for calculate actual local time in this zone you obtain. local time for Etc\GMT-2 (¡a negative zone!). For instance, its' 5:00 PM (UTC/GMT), so in GMT+2 zone (Greece) the local time must be 7:00 PM. But, if you use TZ Database, you obtain. ¡3:00 PM!

And the opposite for "negative zones". 

Is a bit funny. Please, check it.

I found a web page (http://www.gsp.com/support/virtual/admin/unix/tz/gmt/) that use tz database (I think) and shows this error.

Best regards.

P.S.: It is possible that the problem was with the "codes", because in the world there are "GMT+13" and "GMT+14" zones, and these zones do not exist in tz database. However, in tz database exists "GMT-13" and "GMT-14" zones, that not exist in the real world. 
Rodrigo Díaz López
EXIS.rdiaz at iberia.es

Tu viaje de principio a fin

Your journey from start to finish

More information about the tz mailing list