Birthday cake storage?!

That's an awesome cake, move everything to one side of the fridge, make sure you have no fish in there.
Place it on a shelf low enough that you can drape some wrap over the shelf above so if the fridge goes into defrost mode for some reason, it doesn't drip on the cake.

Other than that, it should be fine.

Your son should have a great birthday.

Fancy Feast only spoils your cat, hahaha.

ff topic but I'm sure there must be someone on here that could help.
I'm making a two tier birthday cake for my daughter's party which is this friday.
The cakes will be Madeira, crumb coated and filled with buttercream ( no shortening just pure butter), and covered with fondant icing.
I'm no expert so it will take me a few days to do, I wanted to start tonight. The thing is I have searched and am getting mixed signals. As the filling is perishable I have found even covered with fondant it will need to be refrigerated, yet I have also heard that refrigerating a fondant covered cake isn't a good idea as it ruins. I can't make it a last minite covering as I also need to decorate it and that will take this noob some time.
What would be the best way to store it ?

Cute cake! It looks like you live in Canada so it's still cool up there like it is here in Ohio. I'd find a big box for it and stick it in the garage until noon or 1:00 pm on Sunday, then bring it back into the house. That way the cake and frosting stay cool, but won't freeze. Even if it slightly freezes, it will thaw in time for his party.

Listen to Dottie R. What you want to do is keep the cake cool, but not moist. Her solution is best, second best would be a moisture proof container (box wrapped in plastic wrap) in a fridge.

clear out some stuff in the fridge and put the cake in there