Whitsun (Old English for "White Sunday") is the 49th day (seventh Sunday) after Easter Sunday. In the Christian calendar, it is also known as Pentecost, commemorating the descent of the Holy Spirit upon the disciples.

It has that meaning in the following:

• The Whitsun Weddings is a poem and the title of a collection by Philip Larkin.
• Whitsun, a poem by Sylvia Plath
• A Whitsun Ale (esp., English) is a county fair, with competitions, dancing (traditionally, morris dancing), music, and socialising, usually sponsored by a local pub or tavern.
• Dancing at Whitsun, a song by John Austin Marshall, recorded by Gordon Bok, Joan Baez and others. This song is set to the tune of The False Bride.