Earth Hour
In 2026, Earth Hour celebrates its 20th anniversary. As landmarks and homes across the planet take part in this light-off moment, join the movement and give an hour of your time to care for our planet.
World Water Day
From unpredictable rainfall patterns to shrinking ice sheets, rising sea levels, floods and droughts – most impacts of climate change come down to water. Water is also at the heart of adaptation to climate change, serving as the crucial link between the climate system, human society and the environment. Learn more on water and climate change here.
International Day of Forests
Forests are one of the planet’s most powerful tools against climate change, removing carbon dioxide from the atmosphere and releasing oxygen. By locking carbon pollution in trees, roots and soil, forests reduce the heat-trapping gases and regulate Earth’s temperature. Learn more about forests here.
World Day for Glaciers
Nearly 2 billion people rely on water from glaciers, snowmelt and mountain run-off for drinking, agriculture, and energy production. But warming temperatures are putting these vital resources at risk. If temperatures increase between 1.5°°ä and 4°C, mountain glaciers worldwide are projected to lose 26 to 41 per cent of their total mass by 2100, compared to 2015. Learn more about glaciers here.
International Women's Day
The climate crisis does not affect everyone equally. Women and girls face disproportionate impacts from climate change. Given their position on the frontlines of the climate crisis, women are uniquely situated to be agents of change to mitigate the causes of global warming and adapt to its impacts on the ground.
World Wetlands Day
Wetlands are vital for biodiversity, climate mitigation and adaptation and freshwater availability. Yet, nearly 90 per cent of the world’s wetlands have been degraded since the 1700s. World Wetlands Day 2026 highlights the role of traditional knowledge in sustaining wetland ecosystems and preserving cultural identity.
International Day of Clean Energy
Energy is at the heart of the climate challenge – and key to the solution. To avoid the worst impacts of climate change, greenhouse gas emissions need to be reduced by almost half by 2030 and reach net zero by 2050. To achieve this, we need to end our reliance on fossil fuels and invest in alternative sources of energy that are clean, accessible, affordable, sustainable, and reliable.
International Mountain Day
Glaciers’ melting, driven by rising global temperatures, is increasing flood and landslide risks, threatening billions of peoples’ lives. This International Mountain Day highlights the key role mountain regions play as sources of freshwater and calls for immediate measures to avoid glaciers’ disappearance.
Launch of the International Decade of Sustainable Transport
Decarbonizing the transport sector – responsible for roughly 15 per cent of total greenhouse gas emissions – is vital to limit global warming. Starting in 2026, the will be an opportunity to advance sustainable transport globally.
Seventh session of the United Nations Environment Assembly (Ä¢¹½ÊÓƵEA-7)
The seventh session of the Ä¢¹½ÊÓƵ Environment Assembly focuses on the need to accelerate sustainable solutions and effective responses for a safer and more resilient planet, focusing on healthy ecosystems, sustainable consumption and production, and technological tools to prevent environmental risks.
World Soil Day
Over 95 per cent of our food comes from soils, but climate change and human activities are degrading them. Sustainable soil management practices help preserve biodiversity, improve fertility, and contribute to carbon sequestration, playing a crucial role in the fight against climate change.
World Sustainable Transport Day
The transport sector accounts for roughly 15 per cent of total greenhouse gas emissions, making it the fourth largest source of global emissions. Without action, transport-related emissions could grow by up to 65 per cent by 2050. Decarbonizing the transport sector, through measures like electromobility and alternative fuels, is vital to limit global warming. Learn more about transport and climate change here.
Ä¢¹½ÊÓƵ Climate Change Conference (COP30)
The 30th Ä¢¹½ÊÓƵ climate conference will bring together world leaders, scientists, non-governmental organizations, and civil society to discuss priority actions to tackle climate change. COP30 will focus on the efforts needed to limit the global temperature increase to 1.5°°ä, the presentation of new national action plans (NDCs) and the progress on the finance pledges made at COP29.
World Tsunami Awareness Day
Tsunamis threaten human life, disrupt livelihoods, industry, agriculture, gender equality, and critical services such as education and healthcare. Investments in tsunami early warning, evacuation mapping, and risk education are vital to enhance local preparedness and limit impacts. Learn more about early warning systems here.
World Cities Day
This year’s World Cities Day showcases how data-driven decision-making, technology, and AI can be used to improve urban life and recover from climate change impacts. From early warning systems to geospatial mapping, digital tools can improve basic services, strengthen urban resilience, and create greener spaces for all.
World Food Day
The food we eat, and the way it is produced, affects our health and the environment. World Food Day calls for global collaboration across governments, organizations, sectors, and communities to transform agrifood systems and ensure everyone has access to a healthy diet, living in harmony with the planet. Learn more about the links between food and climate change here.
International Day for Disaster Risk Reduction
Climate change is causing more frequent, intense and costly disasters, severely impacting nature and people. Investments in disaster risk reduction are key, but remain too low in national budgets and international assistance. This year’s International Day for Disaster Risk Reduction calls for a decisive shift: fund resilience now to avoid paying for disasters later.
World Habitat Day
This year’s World Habitat Day is devoted to addressing multiple crises that affect urban areas — including the climate crisis — and highlighting effective responses. Learn how cities around the world are addressing climate change impacts here.
International Day of Awareness on Food Loss and Waste Reduction
Over , and up to 10 per cent of global greenhouse gas emissions are associated with food that is not consumed. Reducing food loss and waste helps cut emissions and is a key element for sustainable agrifood systems, food security, nutrition and health.
World Tourism Day
Tourism can create jobs and strengthen bonds between people and places, but it can also damage the sites and communities it celebrates. Tourism must be inclusive and equitable, and must protect our planet – including by conserving biodiversity, shielding ecosystems, and reducing emissions. World Tourism Day 2025 highlights the transformative power of this sector for a more sustainable future.
