I agree; below is Groupon's explanation of the discount code which makes it seem even more like a joke:
As a young store clerk, Honest Abe once walked 18 miles to return 7¢ to a customer whose wallet was eaten by a bear, so what better way to celebrate President's Day than with some savings? For a limited time, you can buy a Local deal and receive a $10 discount off your purchase of $40 or more! Just enter the promo code 10OFF40LOCAL at checkout.
Presidents' Day, or any day, is not the time to mock the intelligence of the average American. It is an elitist endeavor. It's not the average Joe's fault that John Dewey's followers dumbed him down.