Oooooo - to have the 3/5 combo land on a Saturday when some of us are off work and the retail stores abound!
5s going to spend the money and 3 is going to egg it on (not that they both don't have the ability to spend). Up and down the aisles they go, realizing there are so many things they "need" (at least until tomorrow).
Travel is also a trait with these two so off they go in pursuit of fun and pleasure. Wheeeee! It's just one of those days.
If you're not in the mood to travel or spend money, it's a day of being the child and inventing FUN! Board games, comedy DVDs, sports, movies & theatre, hobbies, walking, exercise, PLAY - all can be accomplished easily. Don't have a partner for the board games? You can have a bit of fun with games online.
However you look at it, it's a time to be restful and enjoy the day. There will be other times for more serious pursuits.