Extracting event information from emails is somewhat faulty with 'de'. Let's use this bug to improve the respective patterns in calendar-extract.properties. As a first step I'll adopt Kristian's suggestion from m.d.l10n and remove dates without any separator from year.month.day and possibly other patterns as well.
For reference: http://hg.mozilla.org/l10n-central/de/rev/e90ebdee49a7 http://hg.mozilla.org/releases/l10n/mozilla-aurora/de/rev/3d3a3967cf25 http://hg.mozilla.org/releases/l10n/mozilla-beta/de/rev/0a32dce2ebbd Next step is to investigate why something like "Wir treffen uns am fünfzehnten Oktober." isn't recognized. Shouldn't from.monthname.day cover this?