CHRISTMAS -- THE REAL TRUTH: More recent scholarly studies prove that the Christmas Tree is from the Tree of Eternal Life (Ge 2:9, 3:22) depicted in church plays of the Middle Ages, not Luther or Druid tree-worshippers, although outdated articles for example in World Book Encyclopedia still repeat the legends and Luther may have originated the use of candles attached to Christmas trees.
The giant cedars of Lebanon used to build the temple at Jerusalem themselves had bright green needles with tan-colored cones, and John 10:22-3 says Christ visited the successor temple during the Jewish "Festival of Dedication," namely Channukah, during winter. Also called the Festival of Lights, it had singing, the carrying of tree branches, homes filled with lights and joy. Celebrated 8 days each time, its date varies yearly but the first Channukah was December 25, making it an even more likely source for the December 25 celebration than Rome's Saturnalia which came later in the month. Some believe Christ was actually born about Oct 1, which would mean Mary conceived 9 months previously, that is about or on December 25. Indeed count 9 months backwards from October to see for yourself. As to Santa Claus, no, he did not come from a vaguely known Asian god who descended chimneys to bring gifts or Siberian wizards but instead the Christian Nicholaus who in the Middle Ages wore red and white and quietly gave dowery gifts of gold coins that saved Christian girls from being sold into slavery or prostitution and was later called St. Nicholas.
In fact Christ himself was wrongly attacked as a "glutton and drunkard" simply for believing in a good time (Mt 11:19). He once turned water to wine at a wedding party in Cana (Jn 2:1-11), told followers to invite needy persons to parties (Lu 14:13-14), and accepted gifts including expensive nard oil. Interestingly, Revelation 1:14 even describes the resurrected Christ's hair as like "white wool" or "snow," his cloak was scarlet-colored (red with a bluish tinge--Mt 27:28), and white symbolized purity. True, all that just coincidentally reminds one of Santa Claus, but do note that the earliest Christians enjoyed balanced merriment at "love feasts" (Jude 12), the angels celebrated Christ's birth (Lu 2), and Job's children had enjoyed birthdays (Job 1:3, 3:1, 3).
Most Christmas trees are topped by a star remindful of the Christ star. According to John Mosley's The Christmas Star (1985) from September 3 BC to June 2 BC Jupiter, known as "the royal planet" passed Regulus "the king star" in the constellation Leo, reversed then passed again, turned and passed a 3rd time. By June 17 Jupiter and Regulus were so close they seemed a single star when seen by the eye. This then is one intriguing possible source for the Christ star in the Bible.
Before Christ's birth unspecified men called "magi" in Biblical Greek came from the East first to Jerusalem (Mt 2:1-2) then went on to find the Christ child in Bethlehem. Some translations render the word magi as astrologers because its root like the word "magician" is linked to the idea of being a person of great might but although magi may refer to people who try to predict the future by observing the stars, using omens and consulting spirit beings as forbidden by God at Deuteronomy 18:10-12, it can also refer to people who worked to predict future weather patterns, good times to plant and harvest, buy and sell crops, etc via careful observation of the clouds, stars and other natural phenomena and with very little to absolutely no special focus on the occult at all. So for solid reasons some Bible translations continue to translate magi as simply "wise men" or "stargazers" and this is also supported by the Bibles positively saying they brought gifts for Christ then also protected him by leaving without telling his location to King Herod who wickedly desired to slay him.
Those who were mistaught to keep their families from celebrating Christmas should not be utterly condemned for doing so as they acted out of lack of accurate knowledge in the past. But also no one should claim that those who do celebrate the birth of Christ are immature, ignorant etc even as the preceding information proves. Please read and meditate on what Paul writes at Colossians 2:16.