To avoid persecution during the Roman pagan festival, early Christians decked their homes with Saturnalia holly. As Christian numbers increased and their customs prevailed, the celebrations took on a Christian observance. But the early church actually did not celebrate the birth of Christ in December until Telesphorus, who was the second Bishop of Rome from 125 to 136AD, declared that Church services should be held during this time to celebrate “The Nativity of our Lord and Saviour.” However, since no-one was quite sure in which month Christ was born, Nativity was often held in September, which was during the Jewish Feast of Trumpets (modern-day Rosh Hashanah). In fact, for more than 300 years, people observed the birth of Jesus on various dates.
In the year 274 AD, solstice fell on 25th December. Roman Emperor Aurelian proclaimed the date as “Natalis Solis Invicti,” the festival of the birth of the invincible sun. In 320 AD, Pope Julius I specified the 25th of December as the official date of the birth of Jesus Christ.
AD is short for Anno Domini, or “Year of our Lord,” as proclaimed by the Roman Catholic Church. Some non-Christians prefer the alternative designation “CE” for “Common Era.”
Christmas official, but not generally observed
In 325AD, Constantine the Great, the first Christian Roman emperor, introduced Christmas as an immovable feast on 25 December. He also introduced Sunday as a holy day in a new 7-day week, and introduced movable feasts (Easter). In 354AD, Bishop Liberius of Rome officially ordered his members to celebrate the birth of Jesus on 25 December.
However, even though Constantine officiated 25 December as the birthday of Christ, Christians, recognizing the date as a pagan festival, did not share in the emperor’s good intentions. Christmas failed to gain universal recognition among Christians until quite recently.
In England, for instance, Oliver Cromwell banned Christmas festivities between 1649 and 1660 through the so-called Blue Laws, believing that Christmas should be a solemn day.
When many Protestants escaped persecution by fleeing to the colonies all over the world, interest in joyous Christmas celebrations was rekindled there. Still, Christmas was not even a legal holiday until the 1800s. And, keep in mind, there was no Father Christmas (Santa Claus) figure at that time.
See: History of Christmas