Jewish calendar plugin for KOrganizer, by Jonathan Singer <leeta.net">jsinger@leeta.net>
Note that it only applies to modern (Gregorian) dates, as KDE/Qt does not support Julian dates. See my KLuach application <www.leeta.net/kluach">http://www.leeta.net/kluach> if you want to look up historical dates.
TRANSLATORS! The weird-looking text strings are the names of Jewish months, holidays and whatnot. They aren't translateable (although European or Near Eastern languages may spell them differently) and should usually just be changed into local characters with the same sound. "I" and "II" are Roman numerals.
Date routines from Jewish Calendar by Frank Yellin