Moving house is not typically something that happens at the last minute. You, quite obviously, have advance notice of the fact that you're going to move, allowing you to determine the best possible schedule for accomplishing the task. But what is the best possible schedule when it comes to hiring movers?
Holiday Clashes
Look at your potential moving dates. Do they clash with any holidays? If possible, you want to avoid any prospective date that may be an appealing moving date for others.