where in the bible does it say to celebrate christmas

The Bible does not directly mention the celebration of Christmas as we know it today. The idea of celebrating Jesus's birth on December 25th was not established until the 4th century, when the Church was trying to replace pagan celebrations with Christian holidays. The Church chose December 25th to coincide with the winter solstice and the pagan holiday of Saturnalia, which was celebrated with feasting and gift-giving.