overlapping of rules? - Palestine

[Olson, Arthur David (NIH/NCI) [E]]

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 at stopwatchmaps.com] 
Sent: Tuesday, October 12, 2010 1:56
To: tz at elsie.nci.nih.gov; 'tz at 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