Match the move-out date to the contract
Read the date you must be out, and book the move to finish before that day.

Find the possession line in the contract and write that date on a calendar you look at every day. The date you hoped for and the date you signed can differ by a weekend or by a week. The signed date is the one that matters. If you are not sure which line it is, ask the closing company or your agent to point to it before you book anything.
Book the move so the house is empty before that day, with a spare hour for keys, a last walk, and the utility readings. A truck that arrives on the morning of possession is late if you still have to load it. Give yourself the day before, or the morning before, depending on how much house you have. If the date moves in a written amendment, move the truck with it. A verbal 'we can stay the weekend' is not a new date.
Ask the mover or the rental desk for the price of the day you need, and write that number next to the date. Do not reserve a truck for a day that is not in the contract yet. A reservation deposit is real money, and a date you guessed can cost a change fee. If you need to stay past possession, that is a written change with its own terms, not a favor you mention at the closing table.
The night before possession, the house should already be empty enough that the last hour is for the broom, the keys, and the envelope. If a room is still full that night, you are moving on the wrong day. Look at the calendar again. The contract date does not move because the truck was busy.
What to do
- Find the possession date and put it on your calendar.
- Book the move to finish before that day.
- Change the booking only when a written amendment changes the date.
- Leave the last hour for keys and a final walk, not for loading.