Because... well... umm... uhhh... because it's International Mother's Act Wierd Day. A secret holiday only celebrated by the most normal moms in the world.
Why can't Junior High football take place in Winter? It's too damn hot in all those pads.
Ludwig Von Whippenfrugen, an early Antarctican explorer who was sent on a voyage to find a new homeland for the Antarcticans when their land mysteriously began freezing over to the point of being uninhabitable for humans. It's still not known how he completely missed what are now known as South America & Africa on the way up to Europe.