Purim

Purim is Judaism's most joyous holiday.  It is actually a mitzvah (good deed) to feast and get drunk on this day.  It's also a mitzvah to give food to your friends and charity to the poor.  It's traditional to dress in costume and eat hat-shaped cookies.  What's not to like about Purim?

He says, "How about having to listen to the whole megillah...twice?"