If you can postpone your trip to the Department of Motor Vehicles you had planned for this week, do it because this is the busiest week of the year at the agency. The Monday after Thanksgiving is called Black Monday because of the high volume of people trying to register their vehicles and take care of other business. If you can, make an appointment, or use one of their kiosks. The influx of customers on Black Monday is believed to be because the DMV is closed from Thanksgiving until the following Monday.