Some holidays/national days lend themselves to food specials and giveaways more than others.
Today is March 14, or 3-14 -- Pi Day. Pi is the equivalent of 3.14159265359, which is a mathematical constant that is the ratio of a circle's circumference to its diameter. It is represented by the Greek letter π, which is pronounced pi.
So, a pie giveaway. Well, then, that only makes sense.
For Monday, St. Patrick's Day, a couple of national chains are doing food specials. One works; the other, not so much.