What can I say? It is a Java problem AND a JSF problem, so to say ;) I added -Duser.timezone=Europe/Berlin to JAVA_OPTS environment property. Now, System.getProperty("user.timezone") is Europe/Berlin TimeZone.getDefault().getID() is Europe/Berlin TimeZone.getDefault().getDisplayName() is Zentraleuropäische Zeit (Central European Time) and the offset is 3600000 ms (i.e. one hour) and useDaylight is true BUT in the DateTimeConverter class getTimeZone().getId() is GMT getTimeZone().getId() is Greenwich Zeit (Greenwich Time) the offset is 0, and useDaylight is false. Well, the JVM has the right timezone set, but JSF ignores it and falls back to Greenwich Mean Time. I think I got a big fat bone to pick with the Apache MyFaces staff ;). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963525#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...