Nature Holidays January 3rd Perihelion Day January 7th Old Rock Day January 8th Earth's Rotation Day January 19th World Snow Day January 28th National Daisy Day January 29th International Carnation Day February 2nd Groundhog Day February 2nd National Hedgehog Day February 2nd World Wetlands Day February 18th Pluto Day February 28th National Skip the Straw Day February 29th Leap Year Day March 1st World Seagrass Day March 3rd World Wildlife Day March 7th Plant Power Day March 14th International Day of Action For Rivers March 21st International Colour Day March 21st International Day of Forests March 22nd World Water Day March 23rd World Meteorological Day April 3rd National Find a Rainbow Day April 13th International Plant Appreciation Day April 22nd Earth Day May 10th International Day of Argania May 19th National May Ray Day May 22nd International Day for Biological Diversity June 1st World Reef Awareness Day June 5th World Environment Day June 8th World Oceans Day June 15th Global Wind Day June 17th World Day to Combat Desertification and Drought June 18th National Go Fishing Day June 21st International Day of the Celebration of the Solstice June 22nd World Rainforest Day June 29th International Day of the Tropics June 29th International Mud Day July 3rd International Plastic Bag Free Day July 13th International Rock Day July 26th International Day for the Conservation of the Mangrove Ecosystem July 28th World Nature Conservation Day August 30th National Beach Day September 4th National Wildlife Day September 16th Collect Rocks Day September 16th World Ozone Day September 29th World Rivers Day October 7th World Cotton Day October 7th World Habitat Day October 22nd National Color Day November 5th World Tsunami Awareness Day November 17th National Hiking Day December 2nd World Pollution Prevention Day December 4th World Wildlife Conservation Day December 5th World Soil Day December 11th International Mountain Day