Usually a night goes from 3 or 4 PM on one day to 10 or 11 AM on the next. That's what you are booking if you are talking about accommodation and not a full 24 hours of stay. If you want more than that (i.e. arriving early or leaving late), you might have to pay more or risk having to wait before getting to your room.

In the hospitality industry, "1 night" refers to a single occupancy period that spans from a hotel's official check-in time on one day to its check-out time the following day. This is a "high-fidelity" logistical unit rather than a full 24-hour block. For example, if a hotel has a 3:00 PM check-in and an 11:00 AM check-out, your "1 night" stay is actually 20 hours. It is a common traveler's trap to think that checking in at 3:00 AM entitles you to stay until the next day's 11:00 AM; in reality, checking in at 3:00 AM technically uses the "night" that began the previous afternoon, and you would still be expected to depart by 11:00 AM that same morning. For hotels, the "night" is the fundamental accounting unit for room inventory, housekeeping schedules, and the application of daily resort fees or taxes, ensuring a consistent cycle of arrivals and departures.