My older kid is pretty excited for Pokkén Tournament, which comes out today for the WiiU. It's a fighting game, much in the style of Namco's Tekken, but using various Pokémon instead of Tekken's usual cast of martial artists. Unlike Street Fighter, which is played in a 2-D plane with a mostly fixed camera perspective, Tekken and Pokkén are usually played in a round arena and the camera swings around perpendicular to the characters, and sidestepping moves is an important defensive technique.
He's certainly a lot more excited about this than about St. Patrick's day, which from his perspective seems to be about wardrobe infractions and green beer. By comparison, Pi Day seemed to have a lot more import, since we gathered around a computer, ate Key Lime Pie, and played quizzes on Sporcle.
Sadly, he will have to wait until I get out of work today to play Pokkén, since I'm picking it up from my local Gamestop on the way home. Preorder customers get an amiibo card that gets you the Shadow Mewtwo character available for use right away. (Presumably there's a complicated method to unlock him otherwise.)
He's got the day off, so he may spend some of it playing The Legend of Zelda:Twilight Princess HD in the meantime.