when did it come into being?
The first known Christmas hymns may be traced to 4th-century Rome.
Christmas carol
The first known Christmas hymns may be traced to 4th-century Rome. 
who was involved in the ww1 christmas truce British and German troops what is the entity about? It was a series of widespread unofficial ceasefires along the Western Front of the First World War around Christmas 1914. what happened during the christmas of 1914? The two sides sang Christmas carols and by shouted Christmas greetings to each other. were there any truces that happened later? After 1914, sporadic attempts were made at seasonal truces; a German unit attempted to leave their trenches under a flag of truce on Easter Sunday 1915 but were warned off by the British opposite them. what can you tell me about the aforesaid song? It is a carol on the theme of Christmas, traditionally sung at Christmas itself or during the surrounding Christmas holiday season.
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Christmas carol [SEP] History
The first known Christmas hymns may be traced to 4th-century Rome. Latin hymns such as "Veni redemptor gentium", written by Ambrose, Archbishop of Milan, were austere statements of the theological doctrine of the Incarnation in opposition to Arianism. "Corde natus ex Parentis" ("Of the Father's heart begotten") by the Spanish poet Prudentius (d. 413) is still sung in some churches today. In the 9th and 10th centuries, the Christmas "Sequence" or "Prose" was introduced in Northern European monasteries, developing under Bernard of Clairvaux into a sequence of rhymed stanzas. In the 12th century the Parisian monk Adam of Saint Victor began to derive music from popular songs, introducing something closer to the traditional Christmas carol.