In the 1800s, the phrase was connected to the much older expression: mad as a March hare. Spring is breeding season for rabbits, and I guess that makes them mad! The basketball March Madness dates ...

It is a strange world, this place of schlock and slogans and, as it did for Alice in Wonderland when the March Hare tried to stuff the dormouse into the teapot, it only gets curiouser and curiouser.