International Day for the Preservation of the Ozone Layer
type: Thing
description: annual commemoration of the date on which the Montreal Protocol was signed
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citations:
  source: Freebase Data Dumps
  stated in qid: Q15241312
  pub year: 2013
meta:
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  domain: world_day
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  license: https://creativecommons.org/publicdomain/zero/1.0/
  api version: v1
  served at: 2026-08-05T22:01:44.831598Z
  entity updated at: 2026-05-03T21:19:00.258443+00:00Z
  entity created at: 2026-04-10T23:29:25.468990+00:00Z