| January |
| 5 January: National Bird Day |
| 29 January: Seed Swap Day |
| 31 January : World Zebra Day |
| February |
| 2 February: World Wetlands Day |
| 27 February: International Polar Bear Day |
| March |
| 3 March: World Wildlife Day |
| 14 March: International Day of Action for Rivers |
| 18 March: Global Recycling Day |
| 21 March: International Day of Forests |
| 22 March: World Water Day |
| 23 March: World Meteorological Day |
| 26 March: Earth Hour |
| April |
| 7 April: World Health Day |
| 17 April : world Bat Day |
| 21 April: World Fish Migration Day |
| 22 April: International Mother Earth Day |
| 29 April: Arbor Day |
| May |
| 2nd Saturday of May (and October): World Migratory Bird Day |
| 20 May: World Bee Day/ Endangered Species Day |
| 21 May: Fish Migration Day |
| 22 May: International Day for Biological Diversity |
| 23 May: World Turtle Day |
| 31 May : World Parrot Day |
| June |
| 3 June: World Bicycle Day |
| 5 June: World Environment Day |
| 5 June: International Day for the Fight against Illegal, Unreported and Unregulated Fishing |
| 7 June: World Food Safety Day |
| 8 June: World Oceans Day |
| 15 June: Global Wind Day |
| 17 June: World Day to Combat Desertification and Drought |
| 17 June : World Crocodile Day |
| 22 June: World Rainforest Day |
| 22June : World Camel Day |
| 29 June: International Day of the Tropics |
| July |
| 1st Week of July: Van Mahotsav (Forest Festival) |
| 16 July : World Snake Day |
| 26 July: International Day for the Conservation of the Mangrove Ecosystem |
| 29 July: International Tiger Day |
| August |
| 8 August : World Cat Day |
| 12 August: World Elephant Day |
| 19 August: International Orangutan Day |
| 26 August: World Dog Day |
| September |
| 7 September: International Day of Clean Air for Blue Skies |
| 16 September: International Day for the Preservation of the Ozone Layer |
| 18 September : World Bamboo Day |
| 22 September: World Rhino Day |
| 24 September : World Rabbit Day |
| 27 September: World Tourism Day |
| 29 September: International Day of Awareness of Food Loss and Waste |
| October |
| 1st Monday of October: World Habitat Day |
| 2nd Saturday of October (and May): World Migratory Bird Day |
| 13 October: International Day for Disaster Reduction |
| 16 October: World Food Day |
| 23 October: International Snow Leopard Day |
| 24 October: International Day of Climate Action |
| 24 October: United Nations Day |
| 31 October: World Cities Day |
| November |
| 5 November: World Tsunami Awareness Day |
| 6 November: International Day for Preventing the Exploitation of the Environment in War and Armed Conflict |
| 19 November: World Toilet Day |
| December |
| 2 December: National Pollution Prevention Day |
| 5 December: World Soil Day |
| 11 December: International Mountain Day |
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