Months of the year and days of the week

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Across
  1. 5. Christmas
  2. 9. Summer holiday 2
  3. 10. Valentine's day
  4. 12. Summer holiday 1
  5. 15. day 3
  6. 16. day 4
  7. 17. day 1
  8. 18. day 7
Down
  1. 1. Thanksgiving
  2. 2. school starts
  3. 3. Halloween
  4. 4. day 5
  5. 6. month number 3
  6. 7. the last month of school
  7. 8. day 2
  8. 11. month number 4
  9. 13. the first month
  10. 14. day 6
  11. 17. month number 5