Happy New Year

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Across
  1. 1. 54321...
  2. 3. December 31st
  3. 4. _____New Year
  4. 5. Twelve of these in a year
  5. 9. Social gathering of invited guests
  6. 10. Toast with this
  7. 11. Promise for the new year
  8. 12. Light these off to celebrate
Down
  1. 2. January 1st
  2. 5. Celebrate when the clock strikes this
  3. 6. Thrown at celebrations
  4. 7. Track months with this
  5. 8. Waltzing, Tango and Samba
  6. 13. Couples do this at exactly midnight