The second single from bassist and vocalist Stephen "Thundercat" Bruner's sophomore album Apocalypse tells the true story of an MDMA-fueled New Year's party. "That party was one of the most epic things that has ever happened," Thundercat told Rolling Stone with a laugh. "Two and a half days of full-on shenanigans, man."
Apocalypse was produced by Californian experimental multi-genre music producer Flying Lotus. He said of this track: "I always loved this song, it's actually the oldest of the bunch. It's probably 2 years old. 'Oh s--t I'm fu--ed up,' you don't know what kind of battle I went thru to actually have those words come out on this album - he was like 'my mom is gonna hear that!!' I said 'that would be everyone's favorite part of the song.'"
The lyrics for "Mary, Did You Know?" were written by Christian singer and comedian Mark Lowry, after his pastor asked him to write a Christmas musical for their church. Southern gospel musician Buddy Greene later added music to his words.