The origins of Christmas can be traced back to a pagan festival called Saturnalia, which was celebrated by the ancient Romans in late December. The holiday was a time for feasting, gift-giving, and general merriment. When Christianity spread throughout the Roman Empire, the church adopted this holiday and transformed it into a celebration of the birth of Jesus Christ. Over time, many of the customs associated with Christmas, such as decorating trees, singing carols, and exchanging gifts, became a part of the holiday.