Analysis of information sources in references of the Wikipedia article "Twelfth Night (holiday)" in English language version.
The Feast of the Presentation is considered by many to be the close of the Christmas to Epiphany Season.
This arrangement became an administrative problem for the Roman Empire as it tried to coordinate the solar Julian calendar with the lunar calendars of its provinces in the east. While the Romans could roughly match the months in the two systems, the four cardinal points of the solar year—the two equinoxes and solstices—still fell on different dates. By the time of the first century, the calendar date of the winter solstice in Egypt and Palestine was eleven to twelve days later than the date in Italy. As a result, the Incarnation came to be celebrated on different days in different parts of the Empire. The Western Church, in its desire to be universal, eventually took them both—one became Christmas, one Epiphany—with a resulting twelve days in between. Over time this hiatus became invested with specific Christian meaning. The Church gradually filled these days with saints, some connected to the birth narratives in Gospels (Holy Innocents' Day, December 28, in honour of the infants slaughtered by Herod; St. John the Evangelist, "the Beloved", December 27; St. Stephen, the first Christian martyr, December 26; the Holy Family, December 31; the Virgin Mary, January 1). In 567, the Council of Tours declared the twelve days between Christmas and Epiphany to become one unified festal cycle.
In 567 AD, the Council of Tours ended a dispute. Western Europe celebrated Christmas, December 25, as the holiest day of the season... but Eastern Europe celebrated Epiphany, January 6, recalling the Wise Men's visit and Jesus' baptism. It could not be decided which day was holier, so the Council made all 12 days from December 25 to January 6 "holy days" or "holidays," These became known as "The Twelve Days of Christmas."
January 5th: Twelfth Night or Epiphany Eve. Twelfth Night, the last evening of the traditional Twelve Days of Christmas, has been observed with festive celebration ever since the Middle Ages.
In the year 567 the church council of Tours called the 13 days between December 25 and January 6 a festival season.
The Second Council of Tours (can. xi, xvii) proclaims, in 566 or 567, the sanctity of the "twelve days" from Christmas to Epiphany, and the duty of Advent fast; …and that of Braga (563) forbids fasting on Christmas Day. Popular merry-making, however, so increased that the "Laws of King Cnut", fabricated c. 1110, order a fast from Christmas to Epiphany.
The Church of England celebrates the season of Epiphany from 6 January to 2 February.
The Council of Tours (567) proclaimed the twelve days from Christmas to Epiphany as a sacred and festive season, and established the duty of Advent fasting in preparation for the feast. The Council of Braga (563) forbade fasting on Christmas Day.
The Council of Tours (567) decreed the 12 days from Christmas to Epiphany to be sacred and especially joyous, thus setting the stage for the celebration of the Lord's birth...
We prefer, like good Anglicans, to go with the logic of the liturgy and regard January 5th as the Twelfth Day of Christmas and the night that ends that day as Twelfth Night. That does make Twelfth Night the Eve of the Epiphany, which means that, liturgically, a new feast has already begun.
Twelfth Night (January 5), Epiphany of Our Lord (January 6), or another day during the time after Epiphany offers an occasion for gathering with friends and family members for a blessing for the home.
Western Europe celebrated Christmas December 25 as the holiest day. Eastern Europe celebrated January 6 the Epiphany, the visit of the Wise Men, as the holiest day... and so they had this council and they decided to make all twelve days from December 25 to January 6 the Twelve Days of Christmas.
In the year 567 the church council of Tours called the 13 days between December 25 and January 6 a festival season.
The Second Council of Tours (can. xi, xvii) proclaims, in 566 or 567, the sanctity of the "twelve days" from Christmas to Epiphany, and the duty of Advent fast; …and that of Braga (563) forbids fasting on Christmas Day. Popular merry-making, however, so increased that the "Laws of King Cnut", fabricated c. 1110, order a fast from Christmas to Epiphany.
And what happens at a Twelfth Night party? According to the 1923 Dennison's Christmas Book, "there should be a King and a Queen, chosen by cutting a cake..." The Twelfth Night Cake has a bean and a pea baked into it. The man who finds the bean in his slice of cake becomes King for the night while the lady who finds a pea in her slice of cake becomes Queen for the night. The new King and Queen sit on a throne and "paper crowns, a scepter and, if possible, full regalia are given them." The party continues with games such as charades as well as eating, dancing, and singing carols. For large Twelfth Night celebrations, a costume party is suggested.
Around the year 400 the feasts of St Stephen, John the Evangelist and the Holy Innocents were added on succeeding days, and in 567 the Council of Tours ratified the enduring 12-day cycle between the nativity and the epiphany.
Western Europe celebrated Christmas December 25 as the holiest day. Eastern Europe celebrated January 6 the Epiphany, the visit of the Wise Men, as the holiest day... and so they had this council and they decided to make all twelve days from December 25 to January 6 the Twelve Days of Christmas.