The agent will try to call 24 hours in advance or more, before the pickup and delivery, but it could be as late as the morning of. They may try to give about a 4-hour window, but you must allow the entire business day! The drivers try to make the time frame that they tell you, but sometimes they may run late due to traffic, weather, or other circumstances. You can request that a 30 minute to 1 hour pre-call be made to you the day of.