def clean_stop_datetime(self):
        start = self.cleaned_data.get('start_datetime')
        stop = self.cleaned_data['stop_datetime']
        # Day entry can't stop before the start
        if start and stop and stop <= start:
            raise forms.ValidationError(_("Stop time can't be less or equal to start time"))
        # Day entry can't stop in more than one futur day from the targeted day date
        if stop and stop.date() > Arrow.fromdate(self.daydate).replace(days=1).date():
            raise forms.ValidationError(_("Stop time can't be more than the next day"))