The cheapest month to buy a car can vary depending on various factors, such as the dealership, the make and model of the vehicle, and the current market conditions. However, some of the best times to buy a car are often at the end of the year, when dealerships are looking to clear out their inventory, and at the end of the month, when sales targets are being met. Additionally, the introduction of a new model year can also be a good time to purchase a vehicle, as dealerships may offer discounts on the previous year's models to make room for the new vehicles. It's also a good idea to keep an eye out for holiday sales, such as Memorial Day or President's Day, which may offer additional discounts and incentives. Ultimately, the best way to find the cheapest time to buy a car is to do your research and keep an eye on market conditions.