I realize that the Roman religious system likes to deny their pagan roots and origins, and do so by trying to subvert the word of God, and by trying to actually re-write history....Dec 25th was celebrated by ancient Babylon 600 years prior to the birth of Jesus...the Babylonians celebrated this day in honour of their sungods...Rome decided to entice early christians into their diabolical religion by in corporating the birth of Jesus in with their pagan celebrations..same goes for easter basically the same story...read Jeremiah 10 and Revelaton 13, 17 and 18 to understand who and what the Roman religious system really is...
There is no commandment in the Bible to keep Jesus' birthday, or easter, and God did not indicate the exact date for that reason...
But the roman religion in keeping with their true roots decided they are bigger than God, and can make days holy and command people to keep them...research available on the website "Roman catholic and protestant confessions"...check out what Cardinal Gibbons and many other leading Roman church followers freely admit..they basically are saying '"the church by it's divine authority has created these extra biblical days"