Earth Day 2026 in US: What it is and why it’s celebrated – California events you can attend

Millions around the world will mark Earth Day on Wednesday, April 22, with campaigns, clean-ups, and sustainability-focused gatherings. The annual observance, created to spark environmental activism, now engages communities across the globe, including several public events in California.

What is Earth Day?

Earth Day is an annual event dedicated to raising awareness about environmental protection. It was founded by activists aiming to mobilize people to clean up and preserve a planet that is now home to roughly 8 billion humans and trillions of other organisms.


The first Earth Day was held on April 22, 1970, and grew into what is widely described as the largest secular day of protest in the world. According to EARTHDAY.ORG, the initial movement led to the creation of the United States Environmental Protection Agency and the passage of major environmental laws.

Is Earth Day a public holiday?

Earth Day is not a federal holiday in the United States. However, schools, nonprofits, and local groups often organize volunteer drives, clean-ups, workshops, and festivals to mark the day.

Why is Earth Day on April 22?

When organizers first planned the event, they wanted strong student participation. The date was chosen to fall between spring break and final exams so college students could attend teach-ins and protests. As the movement expanded nationwide, April 22 became the official date.

While April 22 is observed in the United States, some countries celebrate it on the spring equinox.

Earth Day 2026 events in California you can attend

As per the Visit California webpage, Discover Los Angeles, and earthday.org websites several festivals, clean-ups, and outdoor activities are being held across the state to mark Earth Day and related celebrations.

April 18–26: National Park Week

National Park Week offers visitors a chance to explore California’s iconic parks. Activities include stargazing in Death Valley National Park, wildflower viewing in Joshua Tree National Park, and seeing giant sequoias in Yosemite National Park. Special events are hosted across the nine-day celebration.

April 22 : Climate Solutions Showcase — San Francisco

An evening focused on climate innovation featuring startup pitches, networking, and discussions.

• Time: 5:30 PM
• Location: 224 Townsend St, San Francisco
• Open to public: Yes

The event includes climate-focused entrepreneurs presenting ideas followed by Q&A and networking.

April 21 : Earth Day Festival — San Francisco

Held at Yerba Buena Gardens, this free family-friendly event features live performances, tree planting, chalk art, carousel rides, and interactive activities.

April 25 : Tahoe Truckee Earth Day Festival — North Lake Tahoe

Hosted at The Village at Palisades Tahoe, the festival includes live music, climate exhibits, student fashion shows using recycled materials, and hands-on activities.

April 25 : Earth Day Festival at Courthouse Square — Santa Rosa

This zero-waste event at Courthouse Square features kids’ crafts, local food vendors, cultural performances, composting demos, and workshops.

April 25 : Aquarium of the Pacific Earth Day Teen Climate Fest — Long Beach

Taking place at the Aquarium of the Pacific, the youth-led event includes educational displays, sustainable art, and climate awareness activities.

April 25 : Creek to Bay Cleanup — San Diego

Creek to Bay Cleanup offers volunteer opportunities across multiple coastal and inland locations in San Diego.

April 25 : Celebrate Earth Day — Jefferson Square Park

A volunteer-driven outdoor gathering with tree planting and clean-up activities.

• Date: April 25, 2026
• Location: Jefferson Square Park
• Activities: Trash pick-up, wildflower planting, community meet-up

April 26 Earth Day Festival — Atherton

Held at Holbrook Palmer Park, this community event focuses on climate resilience and sustainability.

• Time: 1 PM – 4 PM
• Activities: Interactive booths, student projects, family-friendly programs

April 25–26 : Santa Barbara Earth Day Festival

One of the largest West Coast celebrations, this event in Santa Barbara features more than 200 exhibitors, eco-marketplaces, electric vehicle showcases, live music, and family-friendly entertainment.

From its roots in campus teach-ins to global participation, Earth Day has grown into a worldwide call for environmental action. With thousands of events organized every year, communities continue using the day to promote sustainability, climate awareness, and local environmental initiatives.