I actually use a module that modifies the calendar module. By default the calendar module has a variable allday that is false when the view is in day or week. But I have a problem, when I switch to month or year view the allday field is activated, I want to disable it in this part too. Someone can help me, because I can't find the way or what to do to execute the action that activates by default the allday field in the calendar view section in month or year.