The rental duration is computed on a day-block basis. If you choose to rent a vehicle from 12PM on day 1 and give it back at 12PM on day 2, this will be counted as two days. The reason for that is because the vehicle is blocked for you for the whole day, even if you use it only for a half-day. In certain occasions (such as returning the vehicle in the very early morning), we can accommodate some exceptions upon email inquiry.