I found what is probably a typo of 2:00 which should perhaps be 2:00s in the C-Eur rule from tz database version 2008d (this part was corrected in version 2008d). The circumstancial evidence is simply the tz database itself, as seen below: Zone Europe/Paris 0:09:21 - LMT 1891 Mar 15 0:01 0:00 France WE%sT 1945 Sep 16 3:00 Zone Europe/Monaco 0:29:32 - LMT 1891 Mar 15 0:00 France WE%sT 1945 Sep 16 3:00 Zone Europe/Belgrade 1:22:00 - LMT 1884 1:00 1:00 CEST 1945 Sep 16 2:00s Rule France 1945 only - Sep 16 3:00 0 - Rule Belgium 1945 only - Sep 16 2:00s 0 - Rule Neth 1945 only - Sep 16 2:00s 0 - The rule line to be changed is: Rule C-Eur 1945 only - Sep 16 2:00 0 - It seems that Paris, Monaco, Rule France, Rule Belgium all agree on 2:00 standard time, e.g. 3:00 local time. However there are no countries that use C-Eur rules in September 1945, so the only items affected are apparently these ficticious zones that translates acronyms CET and MET: Zone CET 1:00 C-Eur CE%sT Zone MET 1:00 C-Eur ME%sT It this is right then the corrected version would look like: Rule C-Eur 1945 only - Sep 16 2:00s 0 - A small step for mankind though 8-) - Jesper Nørgaard Welen No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.4.8/1547 - Release Date: 2008-07-11 18:05