Banyule youth service supports IDAHO! All over the world, thousands of activists are gearing up for the International Day Against Homophobia and Transphobia on May 17th, also known by its acronym IDAHO. This year's IDAHO will break records of mobilisation and outreach, as an estimated 50 million people will be exposed to campaign messages in about 50 countries, calling for an end to discrimination and violence against people on the grounds of sexual orientation and/or gender identity.