There seems to be no way to allow bookings to be made

There seems to be no way to allow bookings to be made from 12am to 12am every day. The business operates 24 hours a day and it needs to be possible to make a booking (for example) at 11pm for 3 hours. Looking through the forums this seems to be an ongoing problem. there was a suggestion to set it the work start and finish times at 00.00 but this is not an option. Have done 12am and 12 am but it still doesn't give me a 24 hour calendar to make bookings on. In fact it results in a period of time where no booking can be made.