Koleda, or Koliada, is an ancient pre-Christian Slavic festival, marking the winter solstice. Ancient Slavs believed that during the dark and cold winter, the border between the spiritual and the mortal worlds is the thinnest. The purpose of Koleda was to bring new light to this dark period and prepare for the next year by blessing local households and keeping malevolent spirits away. For this reason, candles and bonfires were lit in preparation for Koleda to help the winter turn to spring and symbolize the return of the Sun. This gave the ancient Slavs hope and lifted their spirits during the depressing winter.