Buddypress Group Calendar : input format

Hi there,

when creating a new event on my site, datepicker is in "US" format (eg : 2013-03-07) instead of "French" format (eg : 07-03-2013). Same for hour (eg : "07:00 pm" instead of "19:00"). Strangly, when reading created events, format is "normal" (eg : "07 Mars 2013 - 19h00").
Everything seems "normal" in Wordpress general settings ("French" date and hour format). No tweeks done on the plugin or Buddypress insallation.

Could someone help ?

Thanks in advance.
Regards