How to use the list
The table has one row per Year, newest first, with the International years proclaimed for it. When the General Assembly has proclaimed several themes for the same year, they are listed together. Titles marked awaiting confirmation are expected but not yet confirmed by a final resolution, so their wording or year may still change. When no International Year was proclaimed for a year, the row says so.
What International Years are
An International Year is a period the United Nations dedicates to a theme, such as a scientific field, a group of people or a global challenge. It is proclaimed by a resolution of the UN General Assembly, usually a year or more in advance, so that governments, schools, scientists and organizations have time to plan.
The aim is awareness and action. During the year, UN agencies, national committees and civil society organize conferences, exhibitions, publications and educational programs, and many countries issue stamps or coins. A good example is 2009, the International Year of Astronomy, which marked 400 years since Galileo first turned a telescope to the sky. Events around the world invited the public to look through telescopes, often for the first time.
Years, decades and days
International Years are part of a wider system of UN observances:
| Observance | Time span | Purpose |
|---|---|---|
| International Day | One date each year | A recurring reminder, such as International Women’s Day on 8 March |
| International Year | One calendar year | Concentrated attention on one theme |
| International Decade | Ten years | Long-term work on a topic |
Most are proclaimed by the General Assembly, and some days are set by UN agencies such as UNESCO. A theme can appear on more than one level, for example a Day followed later by a Year or a Decade on the same topic.
Why the list starts in 2008
The table covers the years from 2008 onward, a period in which many years carry two or more themes. Earlier International Years exist too, going back several decades, but they are not listed here. The year chips above the table jump straight to any year in the list.
For other kinds of special days, see fun holidays for unofficial and lighthearted dates and public holidays by country for official days off. To see a whole year at once, open the 2026 calendar.