when did christmas begin to be celebrated

Christmas has been celebrated for centuries, with evidence of its earliest beginnings dating back to the 4th century. The celebration of Christmas is believed to have started in Rome, where the tradition of decorating evergreen trees with candles and other decorations began. The holiday eventually spread throughout Europe and the world, becoming an integral part of many cultures' traditions. The popularity of Christmas grew throughout the centuries, with its current form being largely based on the traditions established by the Victorians in the 19th century.