160+ Important Dates for Environmentalists

Dear Fellow Americans,

We’ve noticed that only a couple of eco-friendly holidays like Earth Day and Arbor Day make it onto typical calendars, so we would like to introduce you to our 2025-2026 Planet Planner. This is a supplemental list of celebrations and observances that will give you every excuse you need to educate about environmental issues throughout the year as well as plenty of reminders to take time to enjoy our incredible world. Check this post at the end of each summer to find an updated calendar just in time for the new school semester, and please do share when you come up with a creative way to incorporate them into your space!

Here’s to new traditions,

Amy and Tony

P.S. If you’re interested, every year we also make a list of animal awareness days and a general calendar that empowers people to better care for themselves, the planet, and all of its inhabitants.

Planet Planner Preview — **Looking for a printable list?**
Free Download

August

1 – International Childfree Day
8 – Global Sleep Under the Stars Night
10 – Agent Orange Awareness Day
25 – National Park Service Founders Day
25 – National Secondhand Wardrobe Day
29 – International Day Against Nuclear Tests
30 – National Beach Day
30 – World Day for the End of Speciesism

World Water Week (24th-28th)

National Water Quality Month

September

4 – National Wildlife Day
7 – International Day of Clean Air for Blue Skies
15 – Greenpeace Day
16 – International Day for the Preservation of the Ozone Layer
17 – International Microorganism Day
18 – World Water Monitoring Day
18 – World Bamboo Day
20 – International Coastal Cleanup Day
20 – National CleanUp Day
21 – Zero Emissions Day
22 – World Car-Free Day
26 – World Environmental Health Day
27 – National Public Lands Day
28 – World Rivers Day
29 – International Day of Awareness of Food Loss and Waste
29 – Urban National Wildlife Refuge Day

Zero Waste Week (1st-5th)

FSC Forest Week (20th-26th)

National Organic Month

Secondhand September

October

1 – National Green City Day
1 – World Vegetarian Day
1 – Energy Efficiency Day
4 – No Disposable Cup Day
6 – World Habitat Day
7 – National LED Light Day
10 – National Walk to a Park Day
11 – Urban Wildlife Conservation Day
13 – International Day for Disaster Reduction
14 – International E-Waste Day
24 – International Day of Climate Action

National Forest Products Week (19th-25th)

International Walk to School Month

National Non-GMO Month

November

1 – World Vegan Day
3 – One Health Day
6 – International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
15 – America Recycles Day
17 – National Take a Hike Day
19 – World Toilet Day
20 – Use Less Stuff Day
28 – Buy Nothing Day

Geography Awareness Week (17th-21st)

World Vegan Month

December

2 – World Pollution Prevention Day
4 – World Wildlife Conservation Day
5 – World Soil Day
11 – International Mountain Day
18 – Flake Appreciation Day

January

10 – National Cut Your Energy Costs Day
20 – Take A Walk Outdoors Day
25 – Observe the Weather Day
26 – International Environmental Education Day
28 – International Reducing CO2 Emissions Day
31 – National Seed Swap Day

Veganuary Month

February

2 – World Wetlands Day
4 – National Hemp Day
13 – International Winter Bike to Work Day
27 – National Skip the Straw Day

March

3 – World Wildlife Day
3 – Wangari Maathai Day
12 – National Plant a Flower Day
14 – International Day of Action for Rivers Day
18 – Global Recycling Day
20 – Great American Meatout Day
20 – World Rewilding Day
21 – International Day of Forests
21 – National Flower Day
21 – National Renewable Energy Day
22 – World Water Day
23 – World Meteorological Day
28 – World Day for End of Fishing
28 – National Weed Appreciation Day
28 – Earth Hour
30 – National Take a Walk in the Park Day
30 – International Day of Zero Waste

Food Waste Action Week (Dates TBD)

April

TBD – Mend In Public Day
1 – Fossil Fools Day
5 – International Golden Rule Day
13 – International Plant Appreciation Day
19 – National Hanging Out Day
21 – International Hemp Day
25 – Celebrate Trails Day
29 – Stop Food Waste Day

National Wildlife Week (6th-12th)

International Dark Sky Week (13th-19th)

National Park Week (Dates TBD)

National Month of Hope

Children and Nature Awareness Month

Keep America Beautiful Month

May

3 – International Permaculture Day
3 – Sun Day
4 – Great Lakes Awareness Day
10 – Mother Ocean Day
12 – International Day of Plant Health
15 – National Bike to Work Day
16 – National Love a Tree Day
16 – National River Cleanup Day
16 – Endangered Species Day
22 – International Day for Biological Diversity
25 – International Plastic Free Day
29 – Learn About Composting Day

National Wildflower Week (3rd-9th)

International Compost Awareness Week (3rd-9th)

American Wetlands Month

Clean Air Month

Electromagnetic Radiation Awareness Month

Gardening for Wildlife Month

National Wildfire Awareness Month

June

1 – World Reef Awareness Day
2 – World Peatlands Day
3 – World Bicycle Day
5 – World Environment Day
5 – International Day For the Fight Against Illegal Unreported and Unregulated Fishing
6 – National Prairie Day
6 – National Trails Day
6 – World Green Roof Day
8 – World Oceans Day
15 – Global Wind Day
16 – International Waterfall Day
16 – World Refill Day
17 – World Day to Combat Desertification and Drought
18 – Sustainable Gastronomy Day
21 – World Peace and Prayer Day
22 – World Rainforest Day
24 – Upcycling Day
26 – National Canoe Day
29 – International Day of the Tropics

International Clothesline Week (6th-13th)

End Mountaintop Removal Week (7th-14th)

National Grasslands Week (21st-27th)

Great Outdoors Month

National Camping Month

National Rivers Month

Perennial Gardening Month

July

TBD – Earth Overshoot Day
3 – International Plastic Bag Free Day
4 – Independence From Meat Day
10 – Global Energy Independence Day
11 – World Population Day
12 – National Simplicity Day
18 – World Listening Day
26 – World Mangrove Day
26 – Bog Day
28 – World Nature Conservation Day
29 – World Rain Day
31 – World Ranger Day

Clean Beaches Week (1st-7th)

Coral Reef Awareness Week (20th-26th)

Plastic-Free July

Smart Irrigation Month

National Hemp Month

Wild About Wildlife Month

What’s missing from this list? Comment below!