According to Money Crashers, the best time to buy a large appliance like a new washer and dryer is any holiday weekend, at the end of the month or on weekdays. Although many people wait until their washer and dryers no longer work to purchase a new one, it's best to plan ahead and make the purchase at an optimal time of year. If there is lots of flexibility, try to buy a new washer and dryer in September, October or January.
Old models of large appliances are usually discounted in September or October to make room for new ones. Old inventory is also discounted in January right after the new year begins. Sales are more likely to happen on holiday weekends and at the end of the month, and weekdays are optimal buying times since stores are less crowded. This means that salespeople are also more likely to be available to help answer questions.