In celebration of St. Patrick’s Day, IHOP is serving a short stack of its world-famous buttermilk pancakes for just $1 on Thursday, March 17 from 7 a.m. to 7 p.m. at participating locations. The catch: You must be wearing something green. Limit one short stack per person. Dine-in only. The fluffy offer is not valid with any other coupon or discount.