International Day Against Homophobia, Transphobia and BiphobiaThe International Day Against Homophobia, Transphobia and Biphobia is observed on May 17 and aims to coordinate international events that raise awareness of LGBT rights violations and stimulate interest in LGBT rights work worldwide. By 2016, the commemorations had taken place in 132 countries across the globe.
The founders of the International Day Against Homophobia, as it was originally known, established the IDAHO Committee to coordinate grass-roots actions in different countries, to promote the day and to lobby for official recognition on May 17. That date was chosen to commemorate the decision to remove homosexuality from the International Classification of Diseases of the World Health Organization (WHO) in 1990. Provided by Wikipedia