2025 Sustainability Calendar
Sustainability isn’t limited to policy papers or corporate reports; it lives in our calendars, too. Throughout the year, communities, organisations, and individuals come together to mark days that spotlight the environment, biodiversity, climate, circular economy, and social justice.
This 2025 calendar highlights global and European sustainability moments that inspire awareness, local action, and shared responsibility. While not a compliance or reporting calendar, it’s a guide for anyone looking to align communications, campaigns, or community efforts with key themes throughout the year. Furthermore, we’ve structured the calendar under E, S, and G to help you quickly navigate dates related to Environmental, Social, and Governance themes and align their actions accordingly.
Environmental
January 26, 2025: International Day of Clean Energy
This day promotes the global transition to clean, renewable energy sources. It highlights the role of energy efficiency and innovation in reducing emissions and building sustainable communities.
February 2, 2025: World Wetlands Day
This day highlights the importance of wetlands in protecting biodiversity, supporting clean water systems, and storing carbon. Events often focus on conservation efforts and the role these ecosystems play in regulating the climate.
March 3, 2025: World Wildlife Day
This day raises awareness about the world’s wild animals and plants. It draws attention to endangered species and efforts aimed at protecting habitats from further damage.
March 17–23, 2025: Food Waste Action Week
This week focuses on the environmental impact of wasted food. It encourages households and businesses to reduce waste by planning better, storing food properly, and using leftovers.
March 18, 2025: Global Recycling Day
A reminder of the role recycling plays in conserving resources and cutting emissions. The day promotes better recycling habits and support for innovations that help turn waste into new products.
March 21, 2025: International Day of Forests
This date draws attention to forests and their role in sustaining life. Activities focus on forest preservation, replanting efforts, and the links between forests, air quality, and water cycles.
March 22, 2025: World Water Day
A day to reflect on global water access and usage. Campaigns often focus on clean water availability, sanitation, and how water resources can be managed more responsibly.
March 22, 2025: Earth Hour
For Earth Hour, at 8:30 PM local time, millions of people across the globe switch off their lights for one hour. The event is a symbolic gesture to raise awareness about energy consumption, climate change, and the need for collective environmental action.
April 7, 2025: World Health Day
Led by the WHO, this day focuses on public health challenges and their links to the environment. Clean air, safe water, and climate stability are central to global well-being.
April 22, 2025: Earth Day
Earth Day is one of the most widely observed environmental dates in the calendar. It draws global attention to issues such as deforestation, pollution, and climate breakdown. Events range from community cleanups to school workshops and campaigns promoting environmental protection.
April 30, 2025: Stop Food Waste Day
This day encourages individuals, restaurants, and retailers to cut down on food waste. It promotes practical tips like better portioning, repurposing leftovers, and supporting food-sharing initiatives. The focus is on how small changes in food habits can ease pressure on the planet.
May 22, 2025: Biodiversity Day
The day celebrates the variety of life on Earth. It serves as a reminder of the need to protect ecosystems and species that are disappearing at alarming rates. Educational campaigns often focus on how everything in nature is connected.
June 1–30, 2025: 30 Days Wild
Organised by The Wildlife Trusts, this month-long campaign encourages people to do one small thing connected to nature each day in June. Activities can be as simple as birdwatching, planting flowers, or taking a walk in green spaces.
June 1, 2025: World Reef Awareness Day
This day brings attention to the fragile state of coral reefs. It highlights their role in marine biodiversity and the threats they face from warming seas, pollution, and destructive fishing practices.
June 3, 2025: World Bike Day
A celebration of cycling as a clean, affordable, and healthy mode of transport. The day promotes infrastructure and policies that make cycling safer and more accessible for everyone.
June 3–5, 2025: EU Green Week
Held in Brussels, the EU Green Week is the European Commission’s annual environmental policy event. In 2025, the focus will be on circular economy solutions and how they contribute to economic resilience and sustainability. Alongside the main conference, partner events take place across Europe throughout the month, bringing the theme into local communities and industries.
June 5, 2025: World Environment Day
Led by the United Nations, this global event focuses each year on a different environmental theme. It mobilises individuals, businesses, and governments to take meaningful action through events, campaigns, and pledges.
June 8, 2025: World Ocean’s Day
The health of oceans affects every part of life on Earth. This day supports efforts to protect marine ecosystems, reduce plastic waste, and promote sustainable fishing and coastal management.
June (TBC): EU Sustainable Energy Week
This event brings together policymakers, businesses, and citizens to discuss energy efficiency and renewables across Europe. Organised by the European Commission, it includes a policy conference, local Energy Days, and networking sessions that promote a cleaner, more energy-conscious future.
July (All Month): Plastic Free July
This global movement encourages people to reduce their use of single-use plastics throughout the month. Participants are invited to refuse plastic packaging, carry reusable items, and rethink daily habits that contribute to waste.
September 1–5, 2025: Zero Waste Week
This campaign encourages people to reduce household waste through reuse, recycling, and more mindful consumption. It offers practical ideas to cut down on landfill and rethink the way we use resources.
September (All Month): Organic September
A month-long celebration of organic farming and food. The campaign spotlights the benefits of choosing organic for health, animal welfare, and the environment, while supporting producers who meet these standards.
September 20, 2025: World Clean Up Day
Millions of volunteers across the globe join forces to clean streets, parks, beaches, and waterways. The aim is to raise awareness about littering and promote collective responsibility for public spaces.
September 22–28, 2025: Recycle Week
Led by WRAP, this annual event promotes better recycling habits. The focus varies each year but typically involves tips, local initiatives, and new information about what can and can’t be recycled.
September 28, 2025: World Rivers Day
This global celebration recognises the value of rivers and the ecosystems they support. Activities include clean-up events, educational talks, and campaigns to protect freshwater habitats from pollution and overuse.
October 4, 2025: World Animal Day
A global event that highlights the importance of animal protection. It brings together organisations and individuals working to improve living conditions and advocate for the rights of animals across all species.
October 14, 2025: International E-Waste Day
This date focuses on the growing issue of electronic waste. It promotes responsible recycling of old gadgets and raises awareness about the environmental harm caused by improper disposal.
October 16, 2025: World Food Day
Organised by the UN’s Food and Agriculture Organization, this day addresses food security, sustainable agriculture, and global hunger. Campaigns often highlight the importance of fair food systems and reducing waste from farm to fork.
December 4, 2025: World Wildlife Conservation Day
This day draws attention to the threats facing endangered species across the globe. It supports efforts to combat wildlife trafficking, preserve habitats, and promote conservation through education and policy change.
December 5, 2025: World Soil Day
Healthy soil is the foundation of food systems and biodiversity. This day focuses on preventing soil degradation through sustainable agriculture and land management practices.
December 11, 2025: International Mountain Day
Mountains are home to diverse communities and ecosystems. The day raises awareness of environmental challenges in mountain regions, from melting glaciers to habitat loss, and promotes the protection of these fragile environments.
Social
February 20, 2025: World Day of Social Justice
This is a day to recognise the need for fair access to opportunities and resources. It ties social equity to environmental justice, highlighting how inequality and sustainability are deeply connected.
March 1, 2025: Zero Discrimination Day
Promotes equality and inclusion, regardless of background or identity. The day reminds us that a sustainable future must include everyone.
March 21, 2025: International Day for the Elimination of Racial Discrimination
This day calls for action against racism in all its forms. It encourages inclusive policies and practices, essential for building resilient and equitable communities.
May 17, 2025: International Day Against Homophobia, Biphobia and Transphobia
Raises awareness about discrimination based on sexual orientation and gender identity. It promotes human rights for all.
June 20, 2025: World Refugee Day
Recognises the strength and resilience of displaced people worldwide. It highlights the connections between change, conflict, and forced migration.
August 9, 2025: International Day of the World’s Indigenous Peoples
Highlights the cultures, rights, and contributions of Indigenous communities around the world.
August 12, 2025: International Youth Day
Focuses on the challenges and potential of young people and encourages their active participation in society.
August 19, 2025: World Humanitarian Day
A day to recognise humanitarian workers and the challenges they face. While focused broadly on global aid efforts, it also highlights the connections between humanitarian work and environmental resilience in crisis-prone regions.
September 21, 2025: International Day of Peace
Calls for global ceasefire and non-violence, encouraging education and awareness around peacebuilding.
December 3, 2025: International Day of Persons with Disabilities
This day promotes the rights, dignity, and well-being of people with disabilities in all aspects of society and development. It aims to increase awareness of the barriers that prevent full participation, and to celebrate the contributions and achievements of disabled individuals.
December 10, 2025: Human Rights Day
Commemorates the adoption of the Universal Declaration of Human Rights and promotes the protection of rights and freedoms for all.
December 18, 2025: International Migrant’s Day
Recognises the contributions of immigrants and highlights the need for safe, humane, and orderly migration policies.
Governance
June 24, 2025: International Day of Women in Diplomacy
Celebrates the role of women in shaping global policy and calls for greater gender equality in decision-making for a sustainable future.
July 5, 2025: International Day of Cooperatives
Celebrates the role of cooperatives in building inclusive economies. Their community-first model supports sustainability through shared values and democratic decision-making.
September 15, 2025: International Day of Democracy
Promotes democratic values, institutions, and the importance of public participation in political life.
September 16–22, 2025: European Mobility Week
Cities across Europe take part in this week-long campaign promoting cleaner transport. It encourages walking, cycling, and public transit through workshops, challenges, and car-free events. The week ends with Car-Free Day on 22nd September, already observed in many European towns.
October 24, 2025: UN Day
Marks the anniversary of the United Nations Charter and celebrates the organisation's work in peace, development, and human rights.
November 10–21, 2025: COP30
The 30th UN Climate Change Conference, where world leaders meet to review progress, set new targets, and negotiate agreements on climate action.
From oceans to energy, forests to food, and equity to innovation, this calendar highlights the many aspects of building a more sustainable future. Each date offers a chance to raise awareness, engage communities, and encourage meaningful action.
At Terra Reporting, we help companies turn sustainability goals into clear, credible reports that meet regulatory standards and build trust. If your organisation is looking to align with these global efforts and report with confidence, get in touch with our team to learn how we can support your ESG journey.
