aww, stupid holiday! sorry you may have to wait for another day. can you go shopping for any of the fun stuff you will need like bowls or toys? or make some toys or a bed in preparation?
a friend of mine had a good idea for a covered litter box - she just cut a whole in the side of a lidded plastic tub and used that. maybe just have fun getting all ready for the kitty even if you can't go get him today.