Question: When does the 12th day of christmas begin?

Disambiguated questions and answers:
context: The Oriental Orthodox (other than the Armenians), the Eastern Orthodox, and the Eastern Catholics who follow the same traditions have a twelve-day interval between the two feasts. Christmas and Epiphany are celebrated by these churches on 25 December and 6 January using the Julian calendar, which correspond to 7 January and 19 January using the Gregorian calendar. The Twelve Days, using the Gregorian calendar, end at sunset on 18 January.
question: When does the 12th day of christmas begin for Eastern Christianity?
short_answers: 18 January
wikipage: Twelve Days of Christmas
context: The traditions of the Twelve Days of Christmas have been nearly forgotten in the United States. Contributing factors include the popularity of the stories of Charles Dickens in nineteenth-century America, with their emphasis on generous giving; introduction of secular traditions in the 19th and 20th centuries, e. g., the American Santa Claus; and increase in the popularity of secular New Year's Eve parties. Presently, the commercial practice treats the Solemnity of Christmas, 25 December, the first day of Christmas, as the last day of the "Christmas" marketing season, as the numerous "after-Christmas sales" that commence on 26 December demonstrate. The commercial calendar has encouraged an erroneous assumption that the Twelve Days "end" on Christmas Day and must therefore begin on 14 December.
question: When does the 12th day of christmas begin according to the commercial calendar?
short_answers: Christmas Day
25 December
wikipage: Twelve Days of Christmas
context: The Twelve Days of Christmas, also known as Twelvetide, is a festive Christian season celebrating the Nativity of Jesus. In most Western ecclesiastical traditions, "Christmas Day" is considered the "First Day of Christmas" and the Twelve Days are 25 December through 5 January, inclusive. For many Christian denominations—for example, the Anglican Communion and Lutheran Church—the Twelve Days are identical to Christmastide, but for others, e.g., the Roman Catholic Church, Christmastide lasts longer than the Twelve Days of Christmas.
question: When does the 12th day of christmas begin in most Western ecclesiastical traditions?
short_answers: 5 January
wikipage: Twelve Days of Christmas
context: No context provided
question: When does the 12 days of christmas begin?
short_answers: Christmas Day
December 25
context: No context provided
question: When does the final and 12th day of christmas begin?
short_answers: January 5

Long-form answers:
long_answer: In most Western ecclesiastical traditions, the 12th day of christmas is January 5th. The 12 days of christmas begin December 25 to January 5. According to the commercial calendar, the first day of Christmas (December 25) is considered the last day of the "Christmas" marketing season, as demonstrated by the numerous "after-Christmas sales" that commence on 26 December. When it comes to Eastern Christianity i.e. Oriental Orthodox (other than the Armenians), the Eastern Orthodox, and the Eastern Catholics, Christmas and Epiphany are celebrated by these churches on 25 December and 6 January using the Julian calendar, which correspond to 7 January and 19 January using the Gregorian calendar. The Twelve Days, using the Gregorian calendar, end at sunset on 18 January.
long_answer: The start and end, or 12th day, of the Twelve Days of Christmas are held to be on a number of different dates. In most Western ecclesiastical traditions, Christmas Day is considered the First Day of Christmas and the Twelve Days are 25 December through 5 January, with January 5 being the final and 12th day of Christmas. In Eastern Christianity, the 12th day is held to be on 18 January. Conversely, the commercial calendar holds that the Twelve Days are 14 December to 25 December, with Christmas Day being the 12th day.