International Day Against Homophobia, Biphobia and Transphobia


International Day Against Homophobia, Biphobia, and Transphobia (IDAHOTB) was thought up in 2004 by Louis-Georges Tin of France and it was first celebrated the following year. May 17 was chosen as the date because it marked the anniversary of when the World Health Organization declassified homosexuality as a mental disorder in 1990. The day originally was the International Day Against Homophobia. In 2009, transphobia was added, to bring focus to issues involving gender expression, and to raise awareness about discrimination and violence against transgender people. Biphobia was added to the title in 2015, acknowledging issues faced by bisexual people.

The day works to coordinate events worldwide, but it is not a centralized campaign. Common events include street marches, parades, and festivals. The days' goals are to get the attention of politicians, media, the public, and social movements, so they are aware of discrimination and violence experienced by lesbian, gay, bisexual, transgender, and intersex people (LGBTI) worldwide. It is now the most important day for mobilization on a worldwide scale for LGBTI issues. Some countries and international institutions have recognized the day, and it is particularly popular in Europe and Latin America. In 2014, it was celebrated in 130 countries, including 37 countries where same-sex acts were illegal.

International Day Against Homophobia, Biphobia and Transphobia, also known as International Day Against Homophobia and International Day Against Homophobia and Transphobia, is observed next on Sunday, May 17th, 2020. It has been observed annually on May 17th since 2005.

How to Observe

The day may be celebrated by attending an event related to the day. You could also organize your own event and register it. If you are a teacher or involved with a company, there are resources you could use regarding the day. Learn more about issues related to the day, and explore resources and ideas to take action:

Occurrence Patterns

ObservedFirst YearLast Year
annually on May 17th2005-



Alternate Names

  • International Day Against Homophobia

  • International Day Against Homophobia and Transphobia


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