Christ fulfilled all “the shadows” of things to come. I don’t think he at all minds when we celebrate His birth, rather that we understand why HE came and His purposes.
Rather like people attempting to put a date on His second coming....we see the signs...which as at his birth were significant and with much meaning....but HE’s chosen not to tell us exactly when.
So too His birth...we can get a general idea but to get caught up in when exactly He was born is to miss the message of the “Good News”....and it is that Good news we celebrate...”A Savior is Born”....and generally when Christians do celebrate the Savior’s arrival.
>> “Christ fulfilled all the shadows of things to come.” <<
Actually, no, he only completed some interim fulfillments.
The final fulfillments of Yom Teruah, Yom Kippur, Sukkot, The Last Great Day, and Purim are yet to come.
And Yehova is definitely incensed when men celebrate on pagan feast dates. He gave us the days to celebrate, and we are to do no others.
It is important that the Roman Catholic church has replaced Gods mandated feats with their own devised ‘holy’ days attempting to destroy all things Jewish in an effort to convert the world to their own belief system.
Those specific feasts mandated by God are extremely important in keeping us reminded of Gods specific plan of salvation of man by allowing us to celebrate those very specific events.
The dating of Christmas, to me, is an affirmation of life beginning at conception: born at Tabernacles; CONCEIVED at Christmas, when He began to dwell among us.