Comment 7 for bug 1158834

This has now become *urgent*
The legal position has zigzagged once agai. see:
ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2013+law.pdf (in Hebrew)

The new rules are simpler, no longerlinked to the Jewish calendar:
 # As of 2013, DST starts at 02:00 on the Friday before the last Sunday
# in March. DST ends at 02:00 on the last Sunday of October.

# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Zion 2013 max - Mar Fri>=23 2:00 1:00 D
Rule Zion 2013 max - Oct lastSun 2:00 0 S

For 2013, this means:
    Change IST to IDT on the Last Friday of March (29-Mar-2013) at 01:00
    Change IDT to IST on the Fourth Sunday of October (27-Oct-2013) at 02:00 (Was 7th of September)