Christmas is the time of year when we celebrate the birth of Jesus Christ, who is known as the light of the world. The season is marked by joy, generosity, and goodwill towards all. By saying "Merry Christmas" to one another, we express our well-wishes and blessings for a happy and meaningful holiday. It's a time of peace, love, and hope, and we want to spread that spirit of joy to those around us. So, when you say "Merry Christmas," you're wishing someone a happy and meaningful holiday season full of hope and joy.