Christmas is an ancient holiday, dating back to the 4th century AD. The earliest mention of the holiday comes from a Roman calendar in the year 354 AD, which lists December 25th as the Feast of the Nativity, or the day that Jesus Christ was born. Over time, the holiday evolved and spread across Europe, taking on different forms and customs in each country. Today, Christmas is celebrated all over the world, with people of all faiths and backgrounds coming together to celebrate the birth of Jesus and the joy of the holiday season.