Circle K offering major gas discount. Here's how, when to get it

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Circle K is offering a 40-cent per gallon discount on Aug. 21.

Only members of Circle K Inner Circle rewards program get the discount.

Arizona gas prices are currently averaging $3.28 per gallon, above the national average.

Gas prices continue to rise in Arizona, but a gas station chain is looking to give you a major discount at the pump.

Circle K Fuel Day is Thursday, Aug. 21, at Circle K gas stations across the U.S., which means customers can receive a 40-cent discount per gallon of gas purchased.

The major discount was set to begin at 6 a.m. and lasts until 11:59 p.m. local time on Aug. 21 and is exclusively offered to members of the gas station's Inner Circle rewards program .

Here's everything you need to know to score the big discount on gas in Arizon