About World Development Information Day
The General Assembly in 1972 established World Development Information Day to draw the attention of the world to development problems and the need to strengthen international cooperation to solve them.
The Assembly decided that the date for the Day should coincide with United Nations Day, 24 October, which was also the date of the adoption, in 1970, of the International Development Strategy for the Second United Nations Development Decade.
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Right to Truth Day
Find out the dates, history and traditions of International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims
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Slavery Remembrance Day
For over 400 years, more than 15 million men, women and children were the victims of the tragic transatlantic slave trade, one of the darkest chapters in human history.
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Detained Staff Day
A day to mobilize action, demand justice and strengthen our resolve to protect UN staff and peacekeepers, as well as staff in the non-governmental community and the press.
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International Day of Reflection on the Genocide in Rwanda
On April 7th, the Genocide Memorial Day public holiday in Rwanda memorialises victims of the 1994 Genocide against the Tutsi.
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Other Observances on October 24th 2026
Day of the Libraries
No matter where you are in the world, libraries play an important part in our communities.
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International Day Against Climate Change
International Day of Climate Action is a worldwide movement initiated by young people concerned about climate change and global injustice.
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World Kangaroo Day 🦘
Celebrate the unique beauty of Australia's wildlife on World Kangaroo Day and join the movement to protect these iconic marsupials.
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