Months and seasons of the year

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Across
  1. 2. Month 5
  2. 6. of month 6, 7 and 8
  3. 7. Month 6
  4. 8. Month 9
  5. 10. Month 4
  6. 12. Month 10
  7. 13. of month 3, 4 and 5
  8. 14. of month 9, 10 and 11
  9. 15. Month 3
Down
  1. 1. Month 7
  2. 3. Month 8
  3. 4. Month 1
  4. 5. Month 11
  5. 8. of month 12, 1 and 2
  6. 9. Month 12
  7. 11. Month 2