- 2013: International Year of Water Cooperation
- 2013: International Year of Quinoa
- World Telecommunication and Information Society Day (17 May) [ITU]
- World Day for Cultural Diversity for Dialogue and Development (May 21)
- International Day for Biological Diversity (22 May)
- Day of Vesak (24 May)
- Week of Solidarity with the Peoples of Non-Self-Governing Territories (25–31 May)
This site contains information on United Nations days, weeks, years, decades and other observances, resolutions declaring them, and links to events websites.
United Nations observances contribute to the achievement of the purposes of the UN Charter and promote awareness of and action on important political, social, cultural, humanitarian or human rights issues. They provide a useful means for the promotion of international and national action and stimulate interest in United Nations activities and programmes. For international years and decades the UN Secretary General takes action to establish the preparatory process, evaluation and follow-up procedures.
The majority of observances have been established by the UN General Assembly and some have been designated by UN specialized agencies.
In 1950, the General Assembly approved the first international day — Human Rights Day — to be observed on 10 December. Resolution 423 (V) invited all states and international organizations to observe this day to celebrate the proclamation of the Universal Declaration of Human Rights by the General Assembly on 10 December 1948, and to exert increasing efforts in this field.
In 1978, the General Assembly by its resolution S-10/2 proclaimed the first international week — the week starting 24 October (the day of the founding of the UN) — as a week devoted to fostering the objectives of disarmament (Disarmament Week).
The first international year was proclaimed by the General Assembly in 1959. It was the World Refugee Year [Resolution 1285 (XIII)].
The first UN decade was the United Nations Development Decade designated by the General Assembly in 1961 [Resolution 1710 (XVI)].