Hi, I got your email from http://www.twinsun.com/tz/tz-link.htm. I have recently downloaded this tz file: tzdata2010k.tar.gz I have compiled the tz file for Egypt and find the following: bash-3.00# zdump -v Egypt | grep 2010 Egypt Thu Apr 29 21:59:59 2010 UTC = Thu Apr 29 23:59:59 2010 EET isdst=0 Egypt Thu Apr 29 22:00:00 2010 UTC = Fri Apr 30 01:00:00 2010 EEST isdst=1 Egypt Tue Aug 10 20:59:59 2010 UTC = Tue Aug 10 23:59:59 2010 EEST isdst=1 Egypt Tue Aug 10 21:00:00 2010 UTC = Tue Aug 10 23:00:00 2010 EET isdst=0 Egypt Wed Sep 8 21:59:59 2010 UTC = Wed Sep 8 23:59:59 2010 EET isdst=0 Egypt Wed Sep 8 22:00:00 2010 UTC = Thu Sep 9 01:00:00 2010 EEST isdst=1 Egypt Thu Sep 30 20:59:59 2010 UTC = Thu Sep 30 23:59:59 2010 EEST isdst=1 Egypt Thu Sep 30 21:00:00 2010 UTC = Thu Sep 30 23:00:00 2010 EET isdst=0 All of this looks correct, except for the Sep 8 - Sep 9 changes. Here is what I find on the web about time changes in Egypt: DST ends<http://www.timeanddate.com/worldclock/clockchange.html?n=53> on Midnight between Tuesday, August 10, 2010 and Wednesday, August 11, 2010 local daylight time DST starts<http://www.timeanddate.com/worldclock/clockchange.html?n=53> on Midnight between Thursday, September 9, 2010 and Friday, September 10, 2010 local standard time DST ends<http://www.timeanddate.com/worldclock/clockchange.html?n=53> on Midnight between Thursday, September 30, 2010 and Friday, October 1, 2010 local daylight time On the web, DST starts between Sept 9 and 10th In the TZ file, DST starts between Sept 8 and 9th. Thank you, Rick Stanley Technical Support Engineer, Global Mobile Messaging (within the USA) 1.888.367.8552 | (outside USA) +1.919.460.2150 5200 Paramount Parkway | Morrisville, NC | 27560 | USA Tekelec<http://www.tekelec.com/?LinkID=TK22&PubID=15&DistID=9&AdID=4> [cid:image002.jpg@01CB33CA.88257E40]