” Jesus was born in the fall of the year, not anywhere near the Winter Solstice.”
I don’t know “when exactly” He was born, because I don’t care. It is “THAT HE WAS” born, not which day or month. Christians have chosen to celebrate His birth on December 25th, they had to pick a date as there is no time stamped video of His birth.
Historically, Passover was observed by the Early Church until it was made a capital offence by Constantine in 325 AD. The disciples were following the example of Jesus and his command: “this do in remembrance of me.”
I cannot find any similar example by Jesus or His disciples, nor any command in Scripture to observe the day of His birth. I can only find pagan syncretism in a Christianized form of Saturnalia. Christmas is no more truthful than Kwanzaa is. (And it matters not to me how may people observe either.) I respect God when He tells me to not add to nor take away from the things He has told His followers to do.