When you're making a reservation, it's important that you enter the exact date that you expect to return. For example, you park your car on 3rd May at 23:00 and arrive back at the airport on 7th May at 00:30. This means you should submit a start date of 3rd May and end date of 7th May. In this case, you would pay for five days, as you will be parked on 3, 4, 5, 6, and 7th May.
Why should I fill in the exact date?
It's important to be aware of the fact that all car parks calculate full days. It's not possible to book by the hour, as delays from other customers and other unforeseen circumstances may influence sticking to the agreed time. In terms of the price, it doesn't make a difference if you arrive at 00:30 or 23:30, this means that, if you are delayed, you probably won't need to pay extra.
In general, your arrival time at the airport is calculated as the departure time from the car park. When you arrive at the airport at 23:50, you will not need to pay for the following day. This is also the case if you arrive at the airport at 00:00. Because of this, always fill in the arrival date at the airport.