Here's why it's significant for the play:
* The play's setting: The play's action takes place on the twelfth night after the feast of Epiphany, which is implied by the first lines of the play.
* Themes of disguise and mistaken identity: The celebration of Epiphany often involved revelry and social masking. This theme of disguise and mistaken identity is central to the play's plot.
* The play's celebratory tone: The festive atmosphere of Twelfth Night, a time of celebration and revelry, contributes to the play's light-hearted and humorous tone.
So, while the title might seem straightforward, it holds deeper meaning related to the play's setting, themes, and overall atmosphere.