Would suggest a category under culture for discussing hollidays and other possible future traditions...

I recommend to only implement sub-forums when they are really needed. You do not need a "holiday"-sub-forum for 5 Topics per year.

[Mod Post] Thanks for sharing. We are gathering a list of suggestions and ideas from this forum in order to see what options our users would like to see. This is just a basic forum in order to get things running for now. We will be making improvements according to the input on this board.