Happy Birthday, Dad

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Across
  1. 4. Zodiac sign associated with perfectionism
  2. 6. "Why need GPS?"
  3. 7. Batman to Gotham City
  4. 9. Second weekend of December
  5. 11. ER visitor
  6. 15. Trusty coat
  7. 16. Every 5,000 miles
  8. 18. Office attire
  9. 20. Kind
  10. 22. Not a sister
  11. 24. Six rings
  12. 27. Outdoor cooking
  13. 31. Chinese martial art
  14. 33. A hint to the rest of this puzzle?
  15. 34. Dad's dad
  16. 38. Counterpart of wife
  17. 39. Hammers and Drills
  18. 40. Repairs dents
  19. 42. A coach to his team
  20. 44. Two weeks after the last frost
  21. 45. Artic flappers
  22. 46. My dad loves the ___ Channel
Down
  1. 1. Predecessor to the iPhone
  2. 2. Gentle
  3. 3. "__ Of the Carribbean"
  4. 5. Like a phone case
  5. 8. Reslate
  6. 10. Worst part of April
  7. 12. "__ Buck"
  8. 13. Counterpart of mother
  9. 14. Prodigal __
  10. 17. Adoring
  11. 19. After a muddy drive
  12. 21. Like a new parent
  13. 23. Job for your children
  14. 25. Old ETs
  15. 26. Well-versed
  16. 28. Retiree activity
  17. 29. "It's not the heat, it's the __"
  18. 30. Every week, when the grass is dry
  19. 32. Gives a hoot
  20. 35. Tuesdays in the summer
  21. 36. Paying mind to
  22. 37. 9-5
  23. 41. 70's pants
  24. 43. Daytime snooze