Nothing closes. That is the literal answer and it is not a slogan. Someone on the roster is free at every hour, a 04:30 message gets a confirmation the same way a 16:30 one does, and the arrival window is usually no wider at night.
If anything the night is easier. Forty to sixty minutes is a figure built to survive rush hour, tram traffic and rain. At 03:00 the roads are empty and the same distance takes less work.
So the limit is not on our side. It is on yours, and it is about arithmetic.
Do the subtraction before you book
A booking has a start and a length, and the end of it lands wherever it lands. That sounds obvious until 05:00 arrives and there is a 09:00 flight to be at.
Ninety minutes starting at 04:30 ends at 06:00. Two hours starting at 03:00 ends at 05:00. Three hours starting at 02:00 ends at 05:00, and then there is the getting-up afterwards. None of those are problems. They are just facts worth having in front of you before the confirmation lands rather than after.
The practical rule most people arrive at on their own: pick the duration by counting backwards from the thing you have to do next, not forwards from the hour it is now.
When overnight is the honest answer
Past a certain hour the short bookings stop making sense, and it is usually around the point where the end of a two-hour session would land close to sunrise anyway.
An overnight packs eight hours into one fixed price. The maths against the ladder is not subtle. Every hour after the third adds a full hourly fee, so by six hours you have paid for six, and the overnight block costs less than seven single hours would. By the time you are contemplating a long block that runs into the morning, the eight-hour figure has stopped being the expensive option and started being the sensible one.
It is also the only shape where nobody is watching a clock. That is worth something at 02:00 in a way it is not at 14:00. The rest of the ladder sits in the rates table of every therapist profile.
The hours themselves
Midnight to two is the busiest stretch of a weekend, which affects choice rather than availability. If you want a particular name on a Saturday, send the message before the bars empty rather than after.
Two to four is the quietest part of the process and often the smoothest. Streets are clear. Buildings are silent. Around Rembrandtplein that is the hour when the difference between a good arrival and a slow one stops being traffic and starts being whether we have your floor number.
Four to seven works too. The roster does not have a gap in it. What changes is the world outside: bakeries opening, delivery vans, the first trams. None of it affects the booking, but it does mean a 06:00 arrival at a residential address is a slightly more public event than a 02:00 one.
What does not change after midnight
The price. There is no night rate, no weekend rate and no late surcharge anywhere inside the ring. An hour at 03:00 costs the same as an hour at 15:00.
The confirmation. It comes in writing, whatever the clock says.
The arrival window. Forty to sixty minutes across the centre, the same figure in the Red Light District as anywhere else on the map.
And the payment routes. Euro cash, card, or crypto for whatever is due at the door, with any deposit already sent in the thread. That last one is worth thinking about before the hour gets late, which is a subject of its own.
So: too late to book does not exist. Too late to start three hours might. The distinction is the whole point.