Fast

A fast is a period set aside for not partaking in normal human pleasures such as eating food. In religion, a fast can be used to either purify one's self in order to be devoted to a deity or to have the deity answer a prayer.

In mainstream Smurfs media, the Smurfs undergo a fasting of happiness in the cartoon show episode "Happy Unhappiness Day To You" in order for them to appreciate happiness all year round by giving up doing things that make them happy for one day.