0.1056/NEJM200003233421206. PMC 4336296. PMID 10727591.
- Allan M. Axelrad (July 2005). "Christmas in Cooperstown and Templeton: The Coopers and the Invention of an American Holiday Tradition". In Hugh C. MacDougall. 14th Cooper Seminar, James Fenimore Cooper: His Country and His Art at the State University of New York College at Oneonta, July 2003. pp. 7–18.
- Truscott, Jeffrey A. Worship. Armour Publishing. p. 103. ISBN 9789814305419.
As with the Easter cycle, churches today celebrate the Christmas cycle in different ways. Practically all Protestants observe Christmas itself, with services on 25 December or the evening before. Anglicans, Lutherans and other churches that use the ecumenical Revised Common Lectionary will likely observe the four Sundays of Advent, maintaining the ancient emphasis on the eschatological (First Sunday), ascetic (Second and Third Sundays), and scriptural/historical (Fourth Sunday). Besides Christmas Eve/Day, they will observe a 12-day season of Christmas from 25 December to 5 January.
- Christmastide – Holytrinitygerman.org. Retrieved August 14, 2013.
- Christianson, Stephen G. (January 1, 2000). The American Book of Days. H.W. Wilson. ISBN 9780824209544.
The last evening of the traditional Twelve Days of Christmas is known as the Twelfth Night, or Epiphany Eve.
- Dan Andriacco (2001). "Holy Day Vs. Holiday". Archived from the original on April 4, 2014.
- Don Tennant (November 23, 2011). "Dealing with the 'Christmas' vs. 'Holiday Season' Issue".
- 68% Prefer 'Merry Christmas' Over 'Happy Holidays' – Rasmussem Reports. November 27, 2012. Retrieved August 14, 2013.
- "Christmas season" vs. "Holiday season" – Google Ngram Viewer. Retrieved August 14, 2013.
- Poll: U.S. Split On 'Happy Holidays' Vs. 'Merry Christmas' – Huffington Post. December 16, 2010. Retrieved August 14, 2013.
- Humbug to Holiday: 7 in 10 Canadians Prefer '[ Merry Christmas]' – Canada.com. December 20, 2012. Retrieved August 14, 2013.– Canadian Olympic Team Official Website. Retrieved August 14, 2013.
- Holiday Season Schedules (archived) – DX Group UK. Retrieved August 14, 2013.
- John F. Miller, "Roman Festivals," in The Oxford Encyclopedia of Ancient Greece and Rome (Oxford University Press, 2010), p. 172.
- Catullus 14.15 (optimo dierum), as cited by Hans-Friedrich Mueller, "Saturn," in The Oxford Encyclopedia of Ancient Greece and Rome, p. 221.
- Mills, Watson E.; Edgar V. McKnight; Roger Aubrey Bullard (1990). Mercer Dictionary of the Bible. Mercer University Press. p. 142. ISBN 0-86554-373-9. Retrieved July 10, 2012.
- Aspects of the liturgical year in Cappadocia (325–430) by Jill Burnett Comings 2005 ISBN 0-8204-7464-9 pp. 61–71
- Knecht, Friedrich Justus (1910). A Practical Commentary on Holy Scripture. B. Herder. p. 410. Retrieved 27 December 2016.
We keep a feast on the 2nd of February, forty days after Christmas, in memory of our Lord's Presentation in the Temple. This feast has several names. First, it is known as the Feast of the Presentation of our Lord Jesus. Secondly, it is called the Feast of the Purification of the Blessed Virgin Mary. But the usual and popular name for this Feast is Candlemas-day, because on this day candles are blessed before Mass, and there takes place a procession with lighted candles. Candles are blessed and lighted on this particular feast.
- "Epiphany". Christian Advocate. United Methodist Publishing House. 7: 15. 1963.
Epiphany Day is always Twelfth Night or January 6, and in Methodist usage the Epiphany Season includes all the Sundays between that date and Ash Wednesday, which for 1964 will be February 12, the beginning of Lent.
- "Poll: 72 Percent Of US Support Christian Symbols On Government Property". CBS. December 15, 2014.
- Stetzer, Ed (December 14, 2015). "What Is Church Attendance Like During Christmastime? New Data From LifeWay Research". Christianity Today.
- "The Seasonal Nature of Fires" (PDF). U.S. Fire Administration. January 2005: 15.
- Harn-Shen Chen; Tjin-Shing Jap; Ru-Lin Chen; Hong-Da Lin (February 2004). "A Prospective Study of Glycemic Control During Holiday T