"Mar" breaks date field

I have an input field for a date, like:

<perch:content id="newsdate" type="date" label="Date" required="true" title="true" divider-before="Column left" format="%e. %B %Y" />

Outputting works well, until I select "Mar" for the month. Then no date is output at all in the frontend. All other months work fine.

When I set "%d.%m.%Y" as the format, there is no problem with "Mar".

Any ideas on how to output the date in the desired format (e.g. "1. März, 2014") without errors? The date needs to be localized, as the page is bilingual.