when did the holiday christmas start

The holiday of Christmas has a long and rich history, with many different origins and traditions. The exact date of the first Christmas celebration is unknown, but it is believed to have started as a pagan festival in the 4th century AD, and was later adopted by Christians as a celebration of the birth of Jesus Christ. Over time, Christmas evolved into a global holiday celebrated by people of many faiths and cultures, and today it is celebrated annually on December 25th.