When event takes all day there can not be changed the end date

When an event holds all the day I can not change the end date of the event . For example it should be possible to have an event which holds two days and takes all the days.
Scenario is like this: I create an event telling only the start date and no end date which holds all one day. Then I edit the event and put and end date next day. The event is saved but not with the end date completed.