Is the hotel room booked on the same day or at the check-in time?

It's the last room the hotel reserved for you.

For example, you booked a room at noon and didn't leave until evening. The receptionist said to hold it for you until 23 o'clock.

Then, if you don't go before 23: 00, they can sell your room to other guests, if their room is tight, if you can't arrive on time.

You need to call before 23:00 to change the reservation time, because the hotel can't reserve a room for you for the whole night.

It often happens that guests who have booked a room don't go, stay empty for one night, and other guests come and have no room to sell. Causing losses to the hotel.