Happy Birthday!

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Across
  1. 4. Four walls
  2. 5. Skills
  3. 8. Opposite of me
  4. 9. Sooner or later
  5. 11. Father
  6. 12. Hair-raising, rip-roaring
  7. 14. How to start a letter
  8. 16. Common article
  9. 17. Annual celebration
  10. 20. After
Down
  1. 1. A state of delight
  2. 2. "Whatever you ___, be a good one.” Abe Lincoln
  3. 3. LXX
  4. 6. Daughter
  5. 7. Break free
  6. 8. 365 days
  7. 10. Accompany
  8. 13. Summoned
  9. 15. Also
  10. 18. During
  11. 19. Son-in-law
  12. 21. Shows direction (preposition)