I remember saying rabbits on the first of the month, but where does the white bit come in. I thought it related to the original month not having something but can't remember.
In some places it gets more complicated and even a bit risky...
Don't try this at home.
"...it must be 'White Rabbit' ... but you must also say 'Brown Rabbit' at night and walk downstairs backwards." Reported in a small survey that took place in Exeter, Devon in 1972