Court festivities
Twelfth Night takes its name from the last night of traditional Christmas revels, which coincided with the Christian Feast of the Epiphany (January 6). It is a winter's tale, a happy story full of light, mirth, and music to distract the audience from the English winter gloom.
Perhaps the best of the "festive comedies" (it even has a clown named "Feste"!), Twelfth Night reflects much of the Christmas revels' spirit of festival and liberty. The revels were, as Sir Toby suggests, a time of "cakes and ale" (2.3.104) in defiance of grey winter and black-clothed Malvolio.