Winter Holiday Fun!

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Across
  1. 4. Average age of a cut Christmas tree
  2. 6. George Costanza's holiday tradition
  3. 9. Festival of lights in India
  4. 10. Ancient Roman winter festival
  5. 11. Old Germanic solstice ritual inviting the sun's return
  6. 13. UK celebration on Dec. 26 (2 words)
  7. 16. Celebration also known as Three Kings Day
  8. 18. 6-sided winter weather wonder
  9. 19. "It's a Wonderful Life" star
  10. 21. New year celebration time
Down
  1. 1. Hebrew meaning of Hanukkah
  2. 2. French name for Santa Claus (2 words)
  3. 3. Outdoor singalong activity
  4. 5. African-American celebration of family, community, and culture
  5. 6. Spanish "Merry Christmas" (2 words)
  6. 7. Frozen repository of most fresh water
  7. 8. They're roasted on an open fire
  8. 12. Number of nights in Hanukkah
  9. 14. State that grows the most Christmas trees
  10. 15. Don't eat this color snow!
  11. 17. His heart was two sizes too small
  12. 20. Color of mistletoe berries