Why does Christmas matter to Christians?

Question or Hint Answer or Word

What does incarnation mean? Jesus is God on Earth. (wrong answers: God is Jesus on Earth., Jesus.)
What do Christians believe happened on Christmas Day? Jesus was born. (wrong answers: Jesus died on the cross., God was born.)
Where was Jesus born? In a manger in a stable.
What is Advent? A time when Christians wait and get ready to celebrate Jesus' birth. (wrong answers: The day that Christians celebrate Christmas., A time when Christians wait and get ready to celebrate Jesus' death.)
When are the four outer candles lit on an advent wreath? On each Sunday during Advent. (wrong answers: On each Monday during Advent., On the four days before Christmas.)