International Day Against Homophobia, Biphobia, Lesbophobia and Transphobia 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 over 130 countries.

The date was chosen to commemorate the decision to remove homosexuality from the International Classification of Diseases of the World Health Organization (WHO) in 1990.