| Month | Environmentally Important Days |
| January |
| January 24 | International Day of Education |
| February |
| February 2 | World Wetlands Day |
| February 27 | International Polar Bear Day |
| February 28 | National Science Day |
| March |
| March 3 | World Wildlife Day |
| March 14 | International Day of Action for Rivers |
| March 20 | World Sparrow Day |
| March 21 | World Forestry Day, World Planting Day, World Wood Day |
| March 22 | World Water & Sanitation Day |
| March 23 | World Meteorological Day, World Resources Day |
| April |
| April 7 | World Health Day |
| April 10 | World Atmosphere Day |
| April 18 | World Heritage Day |
| April 22 | World Earth Day |
| May |
| May 3 | International Energy Day |
| May 8 | World Migratory Bird Day |
| May 11 | National Technology Day |
| May 14 | Endemic Bird Day |
| May 21 | World Fish Migration Day |
| May 22 | International Day for Biological Diversity |
| May 23 | World Turtle Day |
| June |
| June 5 | World Environment Day |
| June 8 | World Ocean Day |
| June 9 | Coral Triangle Day |
| June 15 | Global Wind Day |
| June 17 | World Day to Combat Desertification and Drought |
| June 22 | World Rainforest Day |
| June 29 | International Day of the Tropics |
| July |
| July 1 – July 7 | Van Mahotsav Saptah |
| July 3 | World Seabird Day |
| July 11 | World Population Day |
| July 26 | International Mangrove Day |
| July 29 | International Tiger Day |
| August |
| August 10 | World Lion Day |
| August 12 | World Elephant Day |
| August 22 | Honey Bee Day |
| September |
| September 8 | World Cleanup Day |
| September 16 | World Ozone Day |
| September 18 | World Water Monitoring Day |
| September 21 | Zero Emissions Day, International Day of Peace |
| September 26 | World Environmental Health Day |
| October |
| October 1 – Oct 7 | Wildlife Week |
| October 3 | World Nature Day, World Habitat Day |
| October 4 | World Animal Day |
| October 6 | World Wildlife Day |
| October 12 | World Migratory Bird Day |
| October 16 | World Food Day |
| October 24 | International Day of Climate Action |
| November |
| November 6 | International Day for Preventing the Exploitation of the Environment in War and Armed Conflict |
| November 12 | World Birds Day |
| November 14 | World Energy Conservation Day |
| December |
| December 5 | World Soil Day, International Volunteer Day |
| December 11 | International Mountain Day |
| December 14 | National Energy Conservation Day |
