Convenience store chain Circle K has a back-to-school deal that's good for your gas tank and wallet.

Circle K, which has more than 4,000 stores in 22 states, is giving members of its Inner Circle loyalty program 40 cents off per gallon on Thursday, Aug. 21. The Inner Circle Fuel Day deal is good that day from 6 a.m. to 11:59 p.m. local time.

To get the Inner Circle Fuel Day deal, customers must enter the phone number associated with their Inner Circle account at the gas pump or inside the store at checkout before their transaction. (Offer good at participating Circle K Fuel locations; one-time use only.)

Over the past 12 months, Circle K has had 40-cent price reduction Fuel Day promotions for Memorial Day , Thanksgiving and Labor Day .

“The back-to-school season is exciting,

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