The 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. In the 9th edition, in 2013, commemorations took place in almost 120 countries, in all world regions.
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.
The main purpose of the May 17 mobilisations is to raise awareness of violence, discrimination, and repression of LGBT communities worldwide, which in turn provides an opportunity to take action and engage in dialogue with the media, policymakers, public opinion, and wider civil society.
One of the stated goals of May 17 is to create an event that can be visible at a global level without needing to conform to a specific type of action. This decentralized approach is needed due to the diversity of social, religious, cultural, and political contexts in which rights violations occur.