Así se dice 6,7, y 8

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Across
  1. 3. festivals; ex: Cherry Blossom
  2. 5. the organizer
  3. 8. effort
  4. 9. to reunite; to get together with people
  5. 14. religious procession
  6. 16. to work together with other people
  7. 19. to improve
  8. 20. to help
  9. 21. customs
  10. 22. to collabrate
  11. 23. parade; ex: for Thanksgiving
Down
  1. 1. fireworks
  2. 2. collaboration
  3. 4. independence day celebrations; ex: July 4
  4. 6. traditions
  5. 7. firework displays; firework show
  6. 10. anniversary; annual day celebrating a relationship or death
  7. 11. to organize
  8. 12. to be a volunteer
  9. 13. participant
  10. 15. to commemorate; to honor/celebrate
  11. 17. together
  12. 18. pride; satisfaction