References

About

The following are official references used by The IO Foundation for its operations.

Official holidays

Topic	Season	(short)URL	Notes
National, public and school holidays of Estonia.	2025	https://www.eesti.ee/eraisik/en/artikkel/republic-of-estonia/republic-of-estonia/national-public-and-school-holidays	Determines official holidays for TIOF Members under the Estonian jurisdiction.
Selangor State General Release Day 2025	2025	https://www.selangor.gov.my/index.php/pages/view/7500?mid=991	Determines official holidays for TIOF Members under the Malaysian jurisdiction.
Federal holidays of the United States of America	2025	https://www.usa.gov/holidays	Determines official holidays for TIOF Members under the USA jurisdiction.
Delaware State holidays	2025	https://dhr.delaware.gov/labor/holidays/2025.shtml	for TIOF Members under the Delaware jurisdiction.

Global definitions

Topic	(short)URL	Notes
Country Codes ISO 3166-1 Alpha-3	https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3
Language Codes ISO 639	https://en.wikipedia.org/wiki/List_of_ISO_639_language_codes

---