Tomorrow is the first of the month. Pay attention: would you like to ensure good luck for the whole month of May -- and every month thereafter? Why, this can be yours for no more than the words "rabbit rabbit". Say them first thing in the morning, before you say a thing else.
Had you ever heard of this before? No, me neither, but lots of people have. It seems to be at root a British extension of the bunny as luck-bringer.
White rabbit, white rabbit to you.