• United Nations observances

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• Decade of Action for Road Safety 2011?2020
• International Decade for a Culture of Peace and Non-Violence for the Children of the World
• International Decade for Natural Disaster Reduction
• International Decade for People of African Descent
• International Drinking Water Decade, 1981?90
• UN Decade on Ecosystem Restoration
• United Nations Decade for Women
• United Nations Decade of Education for Sustainable Development
• United Nations Decade of Family Farming
• United Nations Decade on Biodiversity
• Water for Life Decade

A

• International Year for People of African Descent
• International Year of Astronomy

B

• International Year of Biodiversity
• International Book Year

C

• International Year of Chemistry
• International Year of the Child
• International Year of Cooperatives
• International Year of Creative Economy for Sustainable Development
• International Year of Crystallography

D

• International Year of Deserts and Desertification
• International Year of Disabled Persons
• Year of the Dolphin

E

• International Year of Planet Earth
• Global Universities Partnership on Environment and Sustainability

F

• International Year of the Family
• International Year of Forests

G

• International Geophysical Year

H

• International Heliophysical Year
• International Year of Human Rights

I

• World Immunization Week
• International Year of Indigenous Languages
• International Day for the Total Elimination of Nuclear Weapons
• International Year of Millets

L

• International Year of Languages
• International Year of Light

M

• International Year of Microcredit
• International Year of the Monument

N

• International Year of Natural Fibres

O

• International Year of Older Persons

P

• International Year of Peace
• International Association of Peace Messenger Cities
• International Year for the Culture of Peace
• World Year of Physics 2005
• International Year of Plant Health
• International Year of the Potato
• International Year of Pulses

R

• International Year of Mobilization against Racism, Racial Discrimination, Xenophobia and Related Intolerance
• International Year of Rice

S

• International Year of Sanitation
• Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
• International Year of Shelter for the Homeless
• International Year of Soil
• International Space Year
• World Space Week
• International Year to Commemorate the Struggle Against Slavery and Its Abolition
• International Year of Basic Sciences for Sustainable Development
• International Year of Sustainable Tourism for Development

T

• United Nations Year for Tolerance

V

• International Year of Volunteers

W

• International Women's Year

Y

• International Year of Youth
• International Youth Year