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

From: Nirav Jk Vora [mailto:nirav.vora@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 vague.

Hi All, Thank you all for your replies. I have gone back conveying the same to the customer. Here is what they have had to say: ------------------------------------------------------------------------------------- According to following link; http://wwp.greenwichmeantime.com/time-zone/europe/european-union/turkey/ turkey time zone settings are as follow which is valid now. Standard Time = GMT+2 Summer Time = GMT+3 According to following link; http://www.timeanddate.com/worldclock/timezone.html?n=107&syear=2000 29 Ekim 2006 Pazar, 01:59:59 1 hour +3 hours EEST 29 Ekim 2006 Pazar, 01:00:00 No +2 hours EET DST ends 25 Mart 2007 Pazar, 00:59:59 No +2 hours EET 25 Mart 2007 Pazar, 02:00:00 1 hour +3 hours EEST DST starts which is consistent with the previous information. To support the below information,I have taken the official newspaper of the government which had declared to regulate the time settings.I have talked with the staff of the government. They said that this declaration is the last daylight saving declaration announced by the government with official newspaper and today rules are valid for this declaration. I am sending the image of the fax that is sent by the government. The newspaper is normally in Turkish. I want to explain it briefly: "26 Mart 2000 Pazar günü saat 01:00'den itibaren bir saat ileri al?nmas?" means "clocks will be set 1 hour forward (will be GMT+3 ) on 26 March 2000 Sunday at 01:00" 01:00 is the local time (23:00 GMT Saturday) and "29 Ekim 200 Pazar günü saat 02:00'den itibaren bir saat geri al?nmas?" means "clocks will be set 1 hour back (will be GMT+2 ) on 29 October 2000 Sunday at 02:00" 02:00 is the local time (23:00 GMT Satruday) I think these documents are enough to show the daylight saving policy of Turkey is: Standard Time = GMT+2 Summer Time = GMT+3 ---------------------------------------------------------------------------------------------------------- So to summarize, the customer has provided a citation from the turkish government which tells about the latest DST rules. I have attached the jpg in this mail. Please review the same and provide your inputs as to whether this information would suffice to change the database timezone rules for Turkey. With Warm Regards ------------------------------------------------------------------ Nirav J Vora Team member, JVM L3 Support(AIX) IBM India Software Lab, Bangalore ( Office: +91-8025094142 È Mobile: +91-9945383481 + e-Mail: nirav.vora@in.ibm.com ------------------------------------------------------------------ JVM Diagnostics Reference @ IBM Internal: http://w3.hursley.ibm.com/java/jim/j2se/ibmproduceddocumentation/javadiagnos... External: http://www.ibm.com/developerworks/java/jdk/diagnosis/ ------------------------------------------------------------------ Peter Ilieve <peter@aldie.co.uk> 02/01/2007 02:58 PM To Nirav Jk Vora/India/IBM@IBMIN cc tz@elsie.nci.nih.gov Subject Re: DST rules for Istanbul, 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 vague.

I don't have any authoritative source but I can add a little context to this. Turkey is attempting to join the European Union (it's listed as a candidate country on the <http://wwp.greenwichmeantime.com/time-zone/europe/european-union/> page). This is proving a long and painful process. It may be that Turkey has officially switched to the EU 01:00 UTC clock change time recently as part of this EU application process. It may be that the website is just confused, showing all pages under the european-union directory as using EU rules even if they don't. I would also go with Devegowda and Thorsen, mainly on the basis that I think it's very unlikely that a country that far east would use 01:00 UTC unless forced to by something like EU rules. Newspaper reports of 01:00 local time are much more credible. Peter Ilieve peter@aldie.co.uk