Christmas observance originated in the Bible

Disinformation

Christmas observance did not originate in the Bible.

The truth

Christmas observance originated in the Bible.

15th day of Tishri 3756 Hebrew Calendar 26th day of September 6 BC Julian Calendar	Gabriel visited Zachariah in Succoth (Luke 1: 10-11), the day in which a whole nation gathered within and without Jerusalem Temple. 9 According to the custom of the priest’s office, his lot was to burn incense when he went into the temple of the Lord. 10 And the whole multitude of the people (λαος = nation) were praying without at the time of incense. (Luke 1: 10-11)
16th day of Tishri 3756 evening Hebrew Calendar 26th day of September 6 BC Julian Calendar	Zacharia departed to his house in Hebron as soon as the days of ministration were accomplished, implying he did not spend the night in Jerusalem (Luke 1:23). He eagerly convey the good news to his wife. And it came to pass, that, as soon as the days of his ministration were accomplished, he departed to his own house. (Luke 1:23)
16th day of Tishri 3756 morning Hebrew Calendar 27th day of September 6 BC Julian Calendar	Zacharia arrived at his house. Considering Jerusalem-Hebron distance and traveling time in the old time on foot over night without sleep, his old age, and a full day of service in the temple, he was exhausted. He took a rest along the rest of the day. Then, the fertilization did not happen in this day but the next day, i.e….
17th day of Tishri 3756 Hebrew Calendar 28th day of September 6 BC Julian Calendar	Elizabeth got pregnant.
17th day of Nisan 3756 Hebrew Calendar 25th day of March 5 BC	Gabriel visited Mary. Mary got pregnant. (Luke 1: 26-27, 36)
25th day of Tevet 3756 Hebrew Calendar 25th day of December 5 BC Julian Calendar	Jesus born in Bethlehem (Luke 2: 6, 11, Matthew 1:25) And so it was, that, while they were there, the days were accomplished that she should be delivered (επλησθησαν αι ημεραι => give birth full-term infant). (Luke 2:6) For unto you is born this day in the city of David a Saviour, which is Christ the Lord. (Luke 2:11) And knew her not till she had brought forth her firstborn son: and he called his name JESUS. (Matthew 1:25)
25th day of Tevet 3756 Hebrew Calendar 25th day of December 5 BC Julian Calendar	First Christmas observance/ celebration by angels (Luke 2: 13-14) And suddenly there was with the angel a multitude of the heavenly host praising God, and saying, “Glory to God in the highest, and on earth peace, good will toward men.” (Luke 2: 13)
25th day of Tevet 3756 Hebrew Calendar 25th day of December 5 BC Julian Calendar	First Christmas observance/ celebration by shepherds (Luke 2: 20) And the shepherds returned, glorifying and praising God for all the things that they had heard and seen, as it was told unto them. (Luke 2: 20)
Circa 65 AD Julian Calendar	1st generation:Remember that Jesus Christ of the seed of David was raised from the dead according to my gospel: (2 Timothy 2:8) Remember that…. => instruction of commemorating Jesus Christ of the seed of David…. => Christmas …was raised from the dead according to my gospel. => Passover/resurrection
circa 70 AD	1st generation: Apostolic constitution by Clement Romanus I
126-137 AD	2nd generation: St. Telesphorus instituted tradition from 1st generation.
168 AD	3rd generation: Theophilus, bishop Caesarean
225 AD	4th generation: Hippolytus In this century, deviating opinion, accusing Christmas as pagan festival, arose from ignorance of biblical verses corroborating Christmas celebration.
4-21 AD centuries	Following Christmas tradition originating in Bible, as listed above.

Conclusion

Christmas observance originated in the Bible.