One thing I love about being a Lutheran Protestant is that Christmas Day is not the end of the Christmas celebration but rather is the beginning of 12 days of celebration that run through Epiphany.
Indeed, the entire year as defined by the liturgical calendar is a celebration of Emmanuel: God is with us. This is the truly distinctive and amazing truth of the Christian faith. God Himself has entered this world taking on flesh and living among us incarnate. The Word has become flesh. Jesus, true God and true Man. This is the ultimate present, His very presence.