http://www.google.com/calendar/event?action=TEMPLATE&text=Kalk%20für%20alle:%20Yoga&dates=20130706T110000Z/20130706T110000Z&details=zum%20Üben%20und%20Mitmachen%20im%20Keller%20von%20„Ganz%20schön%20Kalk“&sprop=Kalkpost