Day-O comes from the Banana Boat Song, a traditional Jamaican folk work song popularised worldwide by Harry Belafonte on his 1956 album Calypso. The call-and-response lyric about daylight coming and wanting to go home described dock workers loading bananas overnight. The recording became Belafonte's signature hit and later reached a new audience through the famous dinner-party possession scene in the 1988 film Beetlejuice. That mix of nostalgia and theatrical timing keeps the short daylight come excerpt circulating as a meme sound for entrances and end-of-shift jokes.