South Texas fast-food institution Whataburger expects to grow its footprint to 16 states in coming months. Credit: Courtesy Photo / Whataburger

San Antonio-based Whataburger is hoping a free iced coffee giveaway can help folks stay awake during the longest day of the year.

The complimentary 16-ounce iced coffees are available from 6 a.m. to 6 p.m. this Thursday at all Whataburger locations, including those in San Antonio, officials with the burger chain said. Customers can even customize their free brews with flavors including vanilla, caramel and mocha.

The promotion is in celebration of the summer solstice, which this year falls on June 30. It’s the day when the Northern Hemisphere receives the year’s longest period of sunlight. San Antonio is projected to receive 14 hours of daylight, and sunset isn’t expected until 8:36 p.m.

After Thursday, the Northern Hemisphere will slowly begin to receive less daylight, eventually receding to Dec. 21, the shortest day of 2024.

For caffeine fiends who keep track of such details, Whataburger’s iced coffee is made with a premium blend of 100% Arabica beans from Colombia, Honduras and Nicaragua, according to company officials.

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Michael Karlis is a multimedia journalist at the San Antonio Current, whose coverage in print and on social media focuses on local and state politics. He is a graduate of American University in Washington,...