Do They Know It’s Life Day was originally written as the 2019 “Holiday Special” for the Raggedy Edge group. It’s been rewritten for others to use with their groups. It can be (borrowing a term from the LEGO Star Wars shows) “canon-adjacent” to your existing campaign – the events may or may not happen – but allowing the GM to gift the players with a fun, silly adventure and some extra XP as a holiday gift.