Ukrainian Christmas festivities begin on Christmas Eve (January 6.) and end on the Feast of the Epiphany. The Christmas Eve Supper or Sviata Vecheria (Holy Supper) brings the family together to partake in special foods and begin the holiday with many customs and traditions, which reach back to antiquity. The rituals of the Christmas Eve are dedicated to God, to the welfare of the family, and to the remembrance of the ancestors.
Read more about the traditions here -> https://ukrainianpeople.us/ukrainian-christmas-traditions/