Rabbits rabbits rabbits.

Does anyone else do this?  Say ‘rabbits’ three times on the first day of every month?  It’s supposed to be good luck.  If you do, could you please tell me why?  I can’t for the life of me figure out what this means, yet I say it every month and have for as long as I can remember.

I’m not supersticious, but there are a few things I do without thinking about it.  I lift my feet when I cross railway tracks in the car.  I cross my fingers when I pass a cemetery.  I know what these ones mean but I just don’t know why I do them.  However, with the ‘rabbits’ thing, I don’t have a clue where it came from.