In Czechia's Mikuláš tradition, celebrated on the eve of St. Nicholas Day (Dec. 6), parents invite Mikuláš, an angel, and a devil to visit children in the home. Good behavior is rewarded with treats while naughtiness is punished with coal, potatoes, or even the threat of being carried sway in a sack. Children sing songs or recite poems to Mikuláš, as they await judgment.