I'm (very belatedly, for which I apologize) forwarding this message from Mamun Shaheed, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Mamun Shaheed [mailto:mamun.shaheed@gmail.com] Sent: Thursday, December 31, 2009 1:13 To: tz@lecserver.nci.nih.gov Subject: problem with java tz database Dear all, I was trying to modify the tzdatabase ($JRE_HOME/lib/zi/*) for JRE, but could not make it sucess. Here is what I have done so far...     1. Downloaded the code and latest tzdata from ftp://elsie.nci.nih.gov/pub/.     2. Modified the asia file and insert my rule there.     3. compile the file with zic.     4. copy the compiled file and put in in $JRE_HOME/lib/zi/Asia/ of my windows pcs     5. run the DSTTest file available in sun.com to check the time zone and got following error   C:\Program Files\Java\jre1.5.0_06\bin>java DSTTest "12/30/2009 1:00 AM" ZoneInfo: wrong magic number: Asia/Dhaka ZoneInfo: wrong magic number: Asia/Dhaka JRE version : 1.5.0_06 Wed Dec 30 01:00:00 GMT 2009 TimeZone tested : Greenwich Mean Time Your tested time is not in daylight-savings time.   C:\Program Files\Java\jre1.5.0_06\bin>   Please help me.   Mamun