The current rules may capture the Palestinian reality--a regular DST end date was established in 2009 (applying from "2009" to "max") with a one-time exception this year ("2010 only"). (Note that the time zone compiler notices that nothing changes on the first Friday of September, 2010 and does not produce any "extra" output.) --ado -----Original Message----- From: Christina Lawrence [mailto:CLawrence@stopwatchmaps.com] Sent: Tuesday, October 12, 2010 1:56 To: tz@elsie.nci.nih.gov; 'tz@elsie.nci.nih.gov' Subject: overlapping of rules? - Palestine Hello! Currently the rules for Palestine are: Rule Palestine 2010 max - Mar lastSat 0:01 1:00 S Rule Palestine 2009 max - Sep Fri>=1 2:00 0 - Rule Palestine 2010 only - Aug 11 0:00 0 - The first line is fine, this is the start-date and says it's in effect from 2010 going forward. The last two lines appear to overlap. The second line says the end-date is the first Friday in Sept starting in 2009 going forward (including 2010). The last line says in 2010 the end-date is Aug 11. I do see that Alexander Krivenyshev (2010-07-20)pointed out the "Clocks to go back during Ramadan--and then forward again" I believe this Aug 11 end-date is a one-time exception. So, does the following make sense, to avoid the overlapping rules for the end date? Rule Palestine 2010 max - Mar lastSat 0:01 1:00 S Rule Palestine 2009 only - Sep Fri>=1 2:00 0 - Rule Palestine 2010 only - Aug 11 0:00 0 - Rule Palestine 2011 max - Sep Fri>=1 2:00 0 - Would this not be more acceptable? I have yet to encounter any overlapping of rules previous to this one. Am I missing something? Thank you for your time! Christina Schneider