Burger King will celebrate National Onion Ring Day on Friday, June 22, 2108 by offering fans free Onion Rings when they bring in a competitor’s French fries order at select locations.

The offer will be available on Friday, June 22 from 10:30 a.m. to midnight at the following four locations only:

1401 W. Fullerton, Chicago, IL

1601 N. Hacienda Boulevard, La Puente, California

474 7th Avenue; New York, NY

108 Boston Street, Lynn, MA

Image – Burger King