The answer to your question is clearly "Yes" as the Judaism site has a specific tag and a policy for asking homouroushumorous question during the period of Purim. See their policy here.
As you can see from the policy it is strictly regulated.
There was an attempt to have something similar on the Spanish site on December 28, the Day of the Holy Innocents and approximate equivalent of the Anglo April Fool's Day on April 1, but it failed to gain popular support. The relevanerelevant meta post is here but note it is in Spanish.