1. Green New Year's Resolution - January 1
2. National Electricity Day - January 9
3. International Zebra Day - January 31
February
4. World Wetlands Day - February 2
5. World Bonobo Day - February 14
6. World Hippopotamus Day - February 15
7. International Polar Bear Day - February 27
March
8. World Wildlife Day - March 3
9. International Day of Action for Rivers - March 14
10. World Consumer Rights Day - March 15
11. Global Recycling Day - March 18
12. World Sparrow Day - March 20
13. International Day of Forests - March 21
14. World Water Day - March 22
15. World Meteorological Day - March 23
16. Earth Hour - Last Saturday of March
April
17. World Aquatic Animal Day - April 3
18. National Park Week - April 19th-27th
19. Dark Sky Week - April 20th-26th
20. Earth Day - April 22
21. National Arbor Day - April's last Friday
May
22. Green Up Day in Vermont - May's first Saturday
23. International Migratory Bird Day in the U.S. and Canada - May's second Saturday
24. Bike-to-Work Day - May's third Friday
25. Greenery Day in Japan - May 4
26. World Bee Day - May 20
27. International Day for Biological Diversity- May 22
28. European Day of Parks - May 24
29. World No Tobacco Day - May 31
June
30. National Trails Day - June's first Saturday
31. World Environment Day - June 5
32. World Oceans Day - June 8
33. Coral Triangle Day - June 9
34. Global Wind Day - June 15
35. World Day to Combat Desertification and Drought - June 17
36. World Rainforest Day - June 22
July
37. National Clean Beaches Week - July 1st-7th
38. World Population Day - July 11
39. World Nature Conservation Day - July 28
40. International Tiger Day - July 29
August
41. Mountain Day - August 11
42. World Elephant Day - August 12
43. National Honey Bee Day - August 21
September
44. National Wildlife Day - September 4
45. International Day of Clean Air - September 7
46. International Day for the Preservation of the Ozone Layer - September 16
47. National Cleanup Day - September 19
48. Clean Up the World Weekend - September's third weekend
49. Zero Emissions Day - September 21
50. European Mobility Week - September 16th-22nd
51. World Car Free Day - September 22
52. National Public Lands Day - September 26
53. National Crush Day - September 27
54. World Rivers Day - September's last Sunday
October
55. World Habitat Day - October's first Monday
56. World Vegetarian Day - October 1
57. World Animal Day - October 4
58. International ShakeOut Day - October's Third Thursday
59. World Planting Day - October 22
60. International Day of Climate Action - October 24
November
61. World Vegan Day - November 1
62. International Day for Preventing the Exploitation of the Environment in War and Armed Conflict - November 6
63. National Recycling Day - November 15
64. National Hiking Day - November 17
December
65. World Soil Day - December 5
66. International Mountain Day - December 11
Source:
https://www.ecoenclose.com/blog/the-ultimate-list-of-ecofriendly-environmental-holidays-a-guide-to-green-holidays/
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