What day is Christmas and What is Christmas What is Christmas. Christmas is a Christian annual Festival for celebrating the birth of Jesus Christ. Christmas is a religious and cultural festival which brings billions of peoples celebration around the whole world . basically the word Christmas is created with two " Christ " which means " Jesus " and " Mas " the " Collection ". the basically Christmas meaning is celebrating the birthday of Jesus together . Development and confirmation of Birth first Christian community made distinguished between the c elebrating the day in worship and the exact date of birth of Jesus Christ . in the starting it t akes a time before the birth of Jesus was officially celebrated. First two major community made Hogue remarks regarding the celebration of Jesus' birth . many church father made remarks on the Jesus birthday and openly regret it.