It seems that Japan is missing its latest rule. The last rule it has is <Rule> <Name>Japan</Name> <From>1950</From> <To>1951</To> <Type>-</Type> <In>May</In> <On>Sun>=1</On> <At>2:00</At> <Save>1:00</Save> <Letter>D</Letter> </Rule> And the timezone is defined as: <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>Japan</Rules> <Format>J%sT</Format> <Until /> <Comment /> </Zone> This forces the user to use JDT as the timezone abbreviation even though I believe they currently don't do daylight savings time. It seems this should be updated to: <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>Japan</Rules> <Format>J%sT</Format> <Until>1951</Until> <Comment /> </Zone> <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>-</Rules> <Format>JST</Format> <Until /> <Comment /> </Zone> Does this make sense? Thanks, Christopher Holt Skyward Innovations, Inc. Office: (603) 206-4552 Cell: (603) 765-0945 cholt@skywardinnovations.com www.skywardinnovations.com The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.