# International Day for the Preservation of the Ozone Layer

> annual commemoration of the date on which the Montreal Protocol was signed

**Wikidata**: [Q2351475](https://www.wikidata.org/wiki/Q2351475)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/International_Day_for_the_Preservation_of_the_Ozone_Layer)  
**Source**: https://4ort.xyz/entity/international-day-for-the-preservation-of-the-ozone-layer


## References

1. [Source](https://undocs.org/es/A/RES/49/114)
2. [Source](https://websitearchive2020.nepa.gov.jm/newscenter/Press_releases/Archive/1999/pr990908.htm)
3. Freebase Data Dumps. 2013
4. [Source](https://www.un.org/en/observances/ozone-day)