DST rules for Istanbul, Turkey

Paul Eggert eggert at CS.UCLA.EDU
Thu Feb 1 08:41:28 UTC 2007

"Olson, Arthur David \(NIH/NCI\) [E]" <olsona at dc37a.nci.nih.gov> writes:

> From: Nirav Jk Vora [mailto:nirav.vora at in.ibm.com] 
> Sent: Tuesday, January 30, 2007 6:16 AM
> Actually as per the current rule that is being used in the JVM
> Daylight saving was supposed to start at 3.00AM . But as per the
> latest rule from the below link, Daylight timings start from 1.00AM...
>  http://wwp.greenwichmeantime.com/time-zone/europe/european-union/turkey/ 

Thanks, but that link says Turkish DST starts at 01:00 GMT (i.e., at
03:00 local time) and ends at 01:00 GMT (i.e., at 04:00 local time).
This agrees with the current tz database.  But Amar Devegowda reported
that Turkish DST actually starts at 01:00 local time and ends at 02:00
local time.  Steffen Thorsen of timeanddate.com agreed, and cited
Turkish newspaper reports from 1996 through 2001.

I'm inclined to go with Devegowda and Thorsen, but what would be
helpful is an official source (e.g., a citation from Turkish law) that
says exactly when this practice started.  So far, all we know is that
the current Turkish practice started before 1996, which is a bit

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