What was once a selection of 31 flavors—Baskin-Robbins "31®" stands for a different ice cream flavor for each day of the month—has grown to more than 1,300 in its flavor library.
Why does Baskin Robbins have 31 flavors?
The company is known for its "31 flavors" slogan, with the idea that a customer could have a different flavor every day of any month. The slogan came from the Carson-Roberts advertising agency (which later merged into Ogilvy & Mather) in 1953.
Is Baskin Robbins doing the 31st Special?
In normal times, Baskin-Robbins has a $1.70 ice cream special on every 31st of the month. On the 31st of every month with 31 days (January, March, May, July, August, October and December) get all regular and kid-sized scoops for the special price of $1.70. Also you can two quarts of prepacked ice cream for $7.99.