While Christmas trees have become a popular symbol of the Christmas holiday, their origins are actually rooted in pagan traditions. In ancient times, trees were revered as sacred symbols of life and fertility, and were often decorated with fruits, nuts, and other offerings to the gods during the winter solstice. Over time, the tradition of decorating trees for the holidays evolved into what we now know as the Christmas tree, which is now associated with the Christian celebration of the birth of Jesus Christ. So while Christmas trees are not inherently religious, they have been incorporated into many religious traditions and customs.