200 Years of LGBTQIA+ History

From Shadows to Pride — UK & Global Timeline

Source Record

May 17

Why this source is used

May 17 page linking the date to the WHO declassification of homosexuality in 1990.

Start with the answer

Start with the answer How did global SOGI advocacy change LGBTQ+ rights? It made LGBTQ+ rights visible through international principles, UN recognition, legal data, country rankings and global convenings. Read the topic guide Global SOGI Advocacy and Data Global SOGI advocacy combined UN resolutions, legal principles, data mapping and international convenings to make LGBTQ+ rights measurable and visible.

Source Status

Publisher
International Day Against Homophobia, Transphobia and Biphobia
Type
organisation
Reliability
medium
Cited by
3 pages

Source Links

Open original source https://may17.org/ Accessed 4 June 2026 Open archived copy https://web.archive.org/web/*/https://may17.org/

Used by Topics

Global SOGI Advocacy and Data

Used by Questions

How did global SOGI advocacy change LGBTQ+ rights?

Used by Timeline Events

17 May 1990 HealthInternational

WHO Removes Homosexuality from International Classification of Diseases

On 17 May 1990, the 43rd World Health Assembly endorsed the tenth revision of the International Classification of Diseases (ICD-10), which removed homosexuality from its list of mental disorders. ILGA had campaigned for this change since its founding in 1978. The ICD-10 explicitly states that sexual orientation by itself is not to be considered a disorder. This date — 17 May — was later chosen as the International Day Against Homophobia, Transphobia and Biphobia (IDAHOBIT), observed annually in over 130 countries.