Patch australasia.20130411.withLHHDT is linked from http://anna.info/wiki/ANNA_time_zone_database - I don't link to the actual location, because that may change. And I don't email, because I don't know what the email client does with the file. The patch includes AEST/AEDT ACST/ACDT AWST/AWDT CWST/CWDT LHDT/LHST/LHHDT -------- The bom.gov.au-patch introduces new syntax, which for itself might be fine, but this new syntax is less informative than the established one and might be seen as deterioration to the whole database. No single use of single "D" for non-1:00 saving has been found by me. There is one single "D" in a LHDT but there it referred to a 1:00 saving. Be consistent, apply common practice established by the maintainers and use: HD 0:30 LHHDT Australia/Lord_Howe For non 1:00 DST offsets the database contains: DD 2:00 NDDT America/St_Johns IDDT Asia/Jerusalem DS 2:00 MDST - Moscow Double Summer Time, BDST - British Double Summer Time HD 0:30 CHDT America/Belize CHDT EHDT America/Santo_Domingo HS 0:30 UYHST America/Montevideo IHST Asia/Colombo CKHST Pacific/Rarotonga HS 0:20 GHST Africa/Accra -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/