In a previous email Robbin Kawabata has shown unintended changes for the tz database relating to the change for the C-Eur Rule in 2008d. Here are the relevant portions of the tz database together with a few suggestions to mend it (with + and - as the first letter of the relevant lines): Rule C-Eur 1944 1945 - Apr Mon>=1 2:00s 1:00 S # Whitman gives 1944 Oct 7; go with Shanks & Pottenger. Rule C-Eur 1944 only - Oct 2 2:00s 0 - Rule C-Eur 1945 only - Sep 16 2:00 0 - ... # These are for backward compatibility with older versions. ... # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone WET 0:00 EU WE%sT Zone CET 1:00 C-Eur CE%sT Zone MET 1:00 C-Eur ME%sT ... Zone Europe/Sofia 1:33:16 - LMT 1880 1:56:56 - IMT 1894 Nov 30 # Istanbul MT? 2:00 - EET 1942 Nov 2 3 :00 - 1:00 C-Eur CE%sT 1945 Apr 2 3:00 + 1:00 C-Eur CE%sT 1945 + 1:00 - CET 1945 Apr 2 3:00 2:00 - EET 1979 Mar 31 23:00 ... Zone Europe/Budapest 1:16:20 - LMT 1890 Oct 1:00 C-Eur CE%sT 1918 1:00 Hungary CE%sT 1941 Apr 6 2:00 - 1:00 C-Eur CE%sT 1945 May 1 23:00 + 1:00 C-Eur CE%sT 1945 1:00 Hungary CE%sT 1980 Sep 28 2:00s ... Zone Europe/Belgrade 1:22:00 - LMT 1884 1:00 - CET 1941 Apr 18 23:00 - 1:00 C-Eur CE%sT 1945 May 8 2:00s + 1:00 C-Eur CE%sT 1945 + 1:00 - CET 1945 May 8 2:00s 1:00 1:00 CEST 1945 Sep 16 2:00s The problem arose because the C-Eur rules had no DST for 1945, making other timezones free to use it without effects for 1945. However this meant that Zone CET and Zone MET did not have DST for 1945, which is not very adequate. I agree with the action of adding DST for C-Eur for 1945, but that means that other timezones using C-Eur must be changed to return status quo. As far as I can see only Europe/Sofia, Europe/Budapest and Europe/Belgrade are affected, though of course Europe/Skopje and other timezones linking to Europe/Belgrade will be equally affected. My suggestion for Europe/Sofia and Europe/Belgrade are to stop using C-Eur from 1945 since the timezone abbreviation (CET) will be the same, and then only start CEST from the previous cutoff dates. For Europe/Budapest the answer is easier since Hungary rule already has the DST start time of May 1, 1945 at 23:00 encoded, so the Hungary rule can simply be used insted of C-Eur since 1945. I don't have access to a zic compiler to see if the desired results crop out, so I will leave that to people who can check it. Jesper Nørgaard Welen Email: jnorgard@Prodigy.Net.mx Project Leader (Líder de Proyecto) Software CIMMYT - Centro Internacional de Mejoramiento de Maíz y Trigo Dirección: CIMMYT Int. c/o Jesper Nørgaard Km. 45, Carretera México-Veracruz El Batán Texcoco, Edo. de México CP 56130 MEXICO Tel.: +52 (55) 58-04-20-04 ext. 1374 Fax: +52 (55) 58-04-75-58 Tel. Casa: 53-10-05-95 ó 53-10-97-78 Download the shareware program World Time Explorer, I made: HYPERLINK "http://www.worldtimeexplorer.com/index.html"http://www.worldtimeexplorer.co m/index.html No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.5.3/1563 - Release Date: 2008-07-20 12:59