Sometimes, knowing when a particular item will go on sale is just common sense: Chances are you would spend a lot more on a winter jacket in November than you would in April.

But it's more difficult to know when to shop for other products, like wedding dresses, champagne, and used cars.

We came up with a definitive calendar for the best things to buy in every month of the year, based on expert advice from websites like DealNews, DailyFinance, and Cheap Flights, among others.

Check out our infographic below to see what you should buy this month, and during every month the rest of the year.