The word "Christmas" is derived from the Old English term "Cristes mæsse," which means "Christ's Mass." The holiday has its roots in the celebration of Jesus Christ's birth, and it has been observed as a religious and cultural tradition for centuries. Over time, Christmas has evolved into a festive and joyful occasion for many people around the world, with traditions such as gift-giving, decorating, feasting, and spending time with loved ones. The holiday is celebrated annually on December 25th.