Stefan Birthday

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Across
  1. 5. Vietnamese holiday with a palindromic name
  2. 7. Apple tablet
  3. 9. small, burrowing mammal
  4. 10. Anatomical ring
  5. 14. not a Serbian car
  6. 16. Car featured in Back to the Future
  7. 18. A type of carbon free energy
  8. 20. Type of calendar
  9. 21. polio solver
  10. 24. Star __
  11. 27. Good, translated
  12. 28. Yalie
  13. 31. Figure skating jump, friend-wise
  14. 32. Basketball Stefan
  15. 33. 18-wheeler
  16. 35. Spy
  17. 36. bulletproof material
  18. 37. Chess clergyman
  19. 38. Graham Cracker
  20. 41. Turn in one's chips
Down
  1. 1. Indian Chief in Michigan
  2. 2. SNL Stefan
  3. 3. Summer vacation destination
  4. 4. Basketball Luka
  5. 6. Western defense group
  6. 8. 3.14 on the calendar
  7. 11. LA internship
  8. 12. Double-decker, e.g.
  9. 13. These must be inspected annually if you are fair skinned
  10. 15. Fragrance or billionaire
  11. 17. Damage caused by a mole, maybe
  12. 19. Holiday celebrated by chemists
  13. 22. so cute
  14. 23. TV show featuring baby Yoda
  15. 25. Yellow jackets home
  16. 26. Balkan, for short
  17. 29. annoy
  18. 30. Where the Tigris and Euphrates Rivers meet
  19. 32. Language of hockey players, for short
  20. 34. Retail giant with a three-syllable name in four letters
  21. 39. Noted start up company based in MA
  22. 40. Serbian car