The Christmas Uprising or Christmas Rebellion (Montenegrin: Божићна побуна, Božićna pobuna or Божићни Устанак, Božićni Ustanak) refers to the uprising of Montenegrin guerrilla fighters aimed at overturning the unification of the Kingdom of Montenegro with the Kingdom of Serbia. The uprising occurred in and around the town of Cetinje on 7 January 1919, the day of Orthodox Christmas.