Flake Appreciation Day

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Across
  1. 2. Special day of celebration
  2. 5. The state of being cold
  3. 7. Frozen crystal in the sky
  4. 9. Low temperature
  5. 10. Coldest season
Down
  1. 1. Feeling of cold
  2. 3. Frozen water
  3. 4. Pieces of snow
  4. 6. White flakes falling from the sky
  5. 8. Ice crystals forming on surfaces