Crump, William D. (September 15, 2001). The Christmas Encyclopedia (3 ed.). McFarland. p. 39. ISBN9780786468270. https://archive.org/details/christmasencyclo00will. "Christians believe that a number of passages in the Bible are prophecies about future events in the life of the promised Messiah or Jesus Christ. Most, but not all, of those prophecies are found in the Old Testament ... Born in Bethlehem (Micah 5:2): "But thou, Bethlehem Ephratah, though thou be little among the thousands of Juda, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting.""
Crump, William D. (September 15, 2001). The Christmas Encyclopedia (3 ed.). McFarland. p. 39. ISBN9780786468270. https://archive.org/details/christmasencyclo00will. "Christians believe that a number of passages in the Bible are prophecies about future events in the life of the promised Messiah or Jesus Christ. Most, but not all, of those prophecies are found in the Old Testament ... Born in Bethlehem (Micah 5:2): "But thou, Bethlehem Ephratah, though thou be little among the thousands of Juda, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting.""
books.google.com
Corinna Laughlin, Michael R. Prendergast, Robert C. Rabe, Corinna Laughlin, Jill Maria Murdy, Therese Brown, Mary Patricia Storms, Ann E. Degenhard, Jill Maria Murdy, Ann E. Degenhard, Therese Brown, Robert C. Rabe, Mary Patricia Storms, Michael R. Prendergast, Sourcebook for Sundays, Seasons, and Weekdays 2011: The Almanac for Pastoral LiturgyArchived April 7, 2015, at the Wayback Machine., LiturgyTrainingPublications, 2010, p. 29.
The Liturgical Year. Thomas Nelson. (November 3, 2009). ISBN978-1-4185-8073-5. https://books.google.com/books?id=inhMGc5732kC&q=date+of+christmas+important&pg=PT40April 2, 2009閲覧. "Christmas is not really about the celebration of a birth date at all. It is about the celebration of a birth. The fact of the date and the fact of the birth are two different things. The calendrical verification of the feast itself is not really that important ... What is important to the understanding of a life-changing moment is that it happened, not necessarily where or when it happened. The message is clear: Christmas is not about marking the actual birth date of Jesus. It is about the Incarnation of the One who became like us in all things but sin (Hebrews 4:15) and who humbled Himself "to the point of death-even death on a cross" (Phil. 2:8). Christmas is a pinnacle feast, yes, but it is not the beginning of the liturgical year. It is a memorial, a remembrance, of the birth of Jesus, not really a celebration of the day itself. We remember that because the Jesus of history was born, the Resurrection of the Christ of faith could happen."
The School Journal, Volume 49. Harvard University. (1894). https://books.google.com/books?id=x_kBAAAAYAAJ&q=date+of+christmas+unimportant&pg=PA469April 2, 2009閲覧. "Throughout the Christian world the 25th of December is celebrated as the birthday of Jesus Christ. There was a time when the churches were not united regarding the date of the joyous event. Many Christians kept their Christmas in April, others in May, and still others at the close of September, till finally December 25 was agreed upon as the most appropriate date. The choice of that day was, of course, wholly arbitrary, for neither the exact date not the period of the year at which the birth of Christ occurred is known. For purposes of commemoration, however, it is unimportant whether the celebration shall fall or not at the precise anniversary of the joyous event."
Michael Stevenson (2004年12月16日). “Expose'; Ten Facts About the Christmas Holiday”. Salvation Station. 3. Christmas Instituted by The Council of Nicea in 325AD. 2021年9月24日閲覧。 “In 325 A.D. Emperor Constantine called together the Council of Nicea which was in essence the first council of the Roman Catholic church. At this council meeting, it was decided that December 25th, the well-known pagan holiday dedicated to Mithras the Persian Sun-god, would be re-dedicated to the celebration of the birth of Jesus Christ.”（英語）
crivoice.org
“The Christmas Season”. CRI / Voice, Institute. April 7, 2009時点のオリジナルよりアーカイブ。April 2, 2009閲覧。 “The origins of the celebrations of Christmas and Epiphany, as well as the dates on which they are observed, are rooted deeply in the history of the early church. There has been much scholarly debate concerning the exact time of the year when Jesus was born, and even in what year he was born. Actually, we do not know either. The best estimate is that Jesus was probably born in the springtime, somewhere between the years of 6 and 4 BC, as December is in the middle of the cold rainy season in Bethlehem, when the sheep are kept inside and not on pasture as told in the Bible. The lack of a consistent system of timekeeping in the first century, mistakes in later calendars and calculations, and lack of historical details to cross-reference events have led to this imprecision in fixing Jesus' birth. This suggests that the Christmas celebration is not an observance of a historical date, but a commemoration of the event in terms of worship.”
dhi-roma.it
Marx, Hans Joachim (1968). “Die Musik am Hofe Pietro Kardinal Ottobonis unter Arcangelo Corelli”. In Friedrich Lippman. Studien zur italienisch-deutschen Musikgeschichte V. Köln, Graz: Böhlau Verlag. pp. 110-111（ドイツ語）
Corinna Laughlin, Michael R. Prendergast, Robert C. Rabe, Corinna Laughlin, Jill Maria Murdy, Therese Brown, Mary Patricia Storms, Ann E. Degenhard, Jill Maria Murdy, Ann E. Degenhard, Therese Brown, Robert C. Rabe, Mary Patricia Storms, Michael R. Prendergast, Sourcebook for Sundays, Seasons, and Weekdays 2011: The Almanac for Pastoral LiturgyArchived April 7, 2015, at the Wayback Machine., LiturgyTrainingPublications, 2010, p. 29.
“The Christmas Season”. CRI / Voice, Institute. April 7, 2009時点のオリジナルよりアーカイブ。April 2, 2009閲覧。 “The origins of the celebrations of Christmas and Epiphany, as well as the dates on which they are observed, are rooted deeply in the history of the early church. There has been much scholarly debate concerning the exact time of the year when Jesus was born, and even in what year he was born. Actually, we do not know either. The best estimate is that Jesus was probably born in the springtime, somewhere between the years of 6 and 4 BC, as December is in the middle of the cold rainy season in Bethlehem, when the sheep are kept inside and not on pasture as told in the Bible. The lack of a consistent system of timekeeping in the first century, mistakes in later calendars and calculations, and lack of historical details to cross-reference events have led to this imprecision in fixing Jesus' birth. This suggests that the Christmas celebration is not an observance of a historical date, but a commemoration of the event in terms of worship.”
