Indiana (East) has no DST set in CLDR supplemental data

Olson, Arthur David (NIH/NCI) [E] olsona at dc37a.nci.nih.gov
Mon Jul 27 21:14:17 UTC 2009


As Ian Davies observed, CLDR data is supplemental--not part of the time zone package. That being said...

"Etc/GMT+5" would have been correct for much of Eastern Indiana through 2006 since DST wasn't observed.
(Recall that there's a UNIX-heritage GMT offset sign reversal; use the commands...
 	TZ=Etc/GMT+5 date
	TZ=EST date
	TZ=EST5 date
...to see that Etc/GMT+5 used to be the right thing.)

Perhaps this particular CLDR data hasn't been updated since 2006.

				--ado

From: Ian Davies [mailto:iand at PartyGaming.com] 
Sent: Monday, July 27, 2009 5:35
To: Olson, Arthur David (NIH/NCI) [E]
Cc: Ian Davies
Subject: Indiana (East) has no DST set in CLDR supplemental data 

Hi,

My team has located and fixed an issue in the CLDR supplemental data for Windows TZ mapping.

http://unicode.org/cldr/data/common/supplemental/supplementalData.xml


Indiana (East) Mapping

Changes...
1.         Change the Etc/GMT+5 type which seems spurious.
2.         Change the daylight flag.


Original...
<mapZone other="US Eastern Standard Time" type="Etc/GMT+5"/>
<!-- S (GMT-05:00) Indiana (East) -->

Updated...
<mapZone other="US Eastern Standard Time" type="Indiana (East)"/>
<!-- D (GMT-05:00) Indiana (East) -->


Could you verify?

Regards, Ian

Ian Davies
Manager, Internationalisation & Multilingual
PartyGaming
Suite 711
Europort, Gibraltar
DD + (350) 200 78700 Ext7060
Mobile + (34) 687898027


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