Christmas Cards

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Across
  1. 5. Festive plant
  2. 6. Close companions
  3. 7. Twelfth month
  4. 8. Happiness
  5. 14. Customary practice
  6. 15. Celebrate with joy
  7. 17. Happiness
  8. 18. Postage
  9. 19. Celebratory
Down
  1. 1. Mark a special day
  2. 2. Festive decoration
  3. 3. Affection and care
  4. 4. Salutations
  5. 9. Festive season
  6. 10. Winter precipitation
  7. 11. Postal delivery
  8. 12. Positive desires
  9. 13. Jolly and cheerful
  10. 16. Closest relatives
  11. 20. Feelings expressed