If you're tasked with making Thanksgiving dinner for your family, there's one day you want to avoid the grocery store.

Michael Ruhlman, author of “Grocery: The Buying and Selling of Food in America,” says the busiest shopping day for Thanksgiving is the Tuesday before the holiday.

What about shopping the night before? That's got to be worse, right?

"Everyone thinks that on Wednesday they will contend with nightmare crowds, so they all try to beat the rush by shopping Tuesday," Ruhlman wrote in his book, according to The Daily Mail.

As it turns out, procrastinating Thanksgiving chefs may be on to something.