Something the app does now is let you drag and drop events is set an event in steps of 15 minutes, ie 15 minutes past the hour.

Personally I never set events at .15 or . 45 past an hour and only use whole hours or half past each hour. It would be great if a setting existed to stop the drag and drop letting me drop events at quarter past or quarter to the next hour as sometimes I'm doing it by accident and its never intentional.

The same issue applies when you touch the calendar and long press to create a new event. Again if this setting was available I would have it setup so that the touch event can't appear at .15 or .45 past the hour.