Christmas puzzle

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Across
  1. 5. Christmas is in this month
  2. 6. this man delivers presents to children
  3. 7. this group recorded a Christmas hit in 1973
  4. 8. you pull these at Christmas
  5. 10. everybody hates these
  6. 12. you eat this at Christmas
  7. 13. you sing these at Christmas
Down
  1. 1. you decorate this piece of nature
  2. 2. name of famous snowman
  3. 3. this baby was born at Christmas
  4. 4. you might give these at Christmas
  5. 9. you might want to wear this when its cold
  6. 11. this reindeer leads the sleigh