The arrival window names the forty to sixty minutes after the office confirms a booking wanted now, before the woman you chose reaches a central Amsterdam door.
A guest choosing from a catalogue sometimes assumes the woman chosen sets the timing: pick Milena, whose profile says Dam Square, for a hotel near Centraal, and surely she will be quicker. The office does not quote it that way. For any central address, whichever of the fifteen is chosen, the office quotes forty to sixty minutes, counted from its confirmation, whether the clock shows mid-afternoon or four a.m.
The neighbourhood on a profile says where a woman lives, not where she happens to be when a message arrives. One span, identical for every part of the centre, is the promise the house can keep every time. It also keeps the choice clean: nobody should be picking a woman for her postcode instead of her portrait.
The window belongs to reservations wanted as soon as possible. A booking for eight tomorrow evening simply begins at eight. Schiphol and the airport hotels sit outside it altogether, with timing arranged in the thread, and those bookings always carry a deposit. Where a same-evening reservation needs a deposit, a guest's first booking for instance, her departure waits for it to clear, so sending it straight after acceptance keeps the evening on schedule.
Forty minutes is ample for the practical things. Turn the heating up first, since a cold room takes longest to put right. Shower. Clear the bed of spare pillows and throws, and leave a clean towel within reach. Keep the phone nearby, because any change of timing is posted in the thread rather than phoned through.
Late-night requests are covered on the tonight page, and home district explains the place name printed on each profile. For bookings made further ahead, see the booking page.