In all forms of Smurfs media, the Smurfs have an array of holidays and festivals, each with a deep and cultural meaning. In the story of the Hundredth Smurf, for example, they have to perform a song and dance to the moon, and for that there needs to be exactly 100 Smurfs to perform that routine.
Related to that, in the comic version of The Fake Smurf, Gargamel finds out that one of the daily routines of the Smurfs is to practice a song and dance routine, but with him having never done that routine, he quickly messes it up.
In The Smurfs And The Golden Tree, there is a festival involving a tree trunk with a gold veneer, which is meant to ward off bad luck and bad spirits.
And then there's the annual Imitate Festival in which every Smurf has to become another Smurf for a whole day.