But this time it's not as crazy as the previous "moo for your supper" event. For that one, people--mainly babies, by the looks of it--actually did turn up in cow costumes, as proved by the photos on the chain's Facebook page. If you really have nothing better to do, you can even vote for your favorite shot.
On Labor Day (September 7), from 10:30 a.m. till closing time, you can get a complimentary chicken sandwich if you wear your sports team logo.
Although if you dare to turn up in an LA Galaxy jersey with a 23 on the back (that's David Beckham's number), there's no guarantee you'll make it out alive.
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You can also go onto the bonkers "Chicken Wave" page of the website to sign up for a freebie, enter into a competition to win a gift card and generally waste yet more time.