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.
Check out our infographic below to see what you should buy this month, and during every month the rest of the year.
TODAY IN SLATE
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Happy Constitution Day!
Too bad it’s almost certainly unconstitutional.