Have to keep in fridge?

[mnahmnah]

Hi

I’m not much of a baker so would appreciate the answer to this please. I’m making cakes with buttercream icing tonight, to take to work tomorrow. Do I have to keep them in the fridge because of the icing? Or will they be ok in a cake tin? I don’t want the cake itself to be made hard or dry in the fridge. Thanks!

[LIZS]

Airtight tin in a cool place.

[mnahmnah]

Thank you!