International Day for Biological Diversity
As the global community is called to re-examine our relationship to the natural world, one thing is certain: despite all our technological advances we are completely dependent on healthy and vibrant ecosystems for our water, food, medicines, clothes, fuel, shelter and energy.
World Environment Day
World Environment Day, which Baku will host on 5 June 2026, is the largest global platform for environmental engagement and action. Established by the UN General Assembly in 1972, the Day inspires and is celebrated by millions of people across the world, who participate in online and in-person activities and events around the world aimed at accelerating environmental progress for people and planet.
2026 Innovate4Cities Conference
The 2026 Innovate4Cities Conference (I4C26) is the fourth global convening that brings together local, regional and national governments, academia, civil society, and industry to close priority knowledge gaps and provide an evidence base that can be used to deliver city climate action.
World Population Day
World Population Day is celebrated annually on 11 July to focus attention on the urgency and importance of population issues.
World Cleanup Day
On 8 December 2023, the United Nations General Assembly, in its seventy-eighth session, unanimously adopted resolution 78/122 “World Cleanup Day”, which proclaims 20 September as World Cleanup Day.
The resolution invites all Member States, organizations of the United Nations system, other international and regional organizations, and other relevant stakeholders – including civil society, the private sector and academia – to observe…
World Habitat Day
World Habitat Day is marked on the first Monday of October each year and is recognized by the United Nations to reflect on the state of towns and cities, and on the basic right of all to adequate shelter. The day is also intended to remind the world that everyone has the power and the responsibility to shape the future of towns and cities.
Smart City Expo Miami
Among its most visible contributions is the internationally recognized Smart City Expo Miami, a flagship event that convenes global leaders, policymakers, business executives, and civic innovators each year. The expo has evolved into the leading platform for smart city dialogue and collaboration in the United States, connecting South Florida's unique local energy with global intelligence and insight.
By promoting cutting-edge ideas in…
World Cities Day
World Cities Day brings Urban October to an end on 31 October each year and was first celebrated in 2014. As with World Habitat Day, a global observance is held in a different city each year and the day focuses on a specific theme.
United Nations Water Conference
Achieving Sustainable Development Goal (SDG) 6 on Clean Water and Sanitation is an essential end in itself and is also critical to progress on the 2030 Agenda as a whole. As we enter the final 5 years of the 2030 Agenda and its SDGs, the world must surge investment, innovation, political will and a spirit of solidarity into SDG 6.
The 2026 United Nations Water Conference, co-hosted by the United Arab Emirates and Senegal, and convened…
World Habitat Day
World Habitat Day is marked on the first Monday of October each year and is recognized by the United Nations to reflect on the state of towns and cities, and on the basic right of all to adequate shelter. The day is also intended to remind the world that everyone has the power and the responsibility to shape the future of towns and cities.
World Maritime Day
The World Maritime Day theme for 2025 "Our Ocean, Our Obligation, Our Opportunity" reflects the ocean’s vital role in the world economy, with more than 80% of global trade transported by sea. The ocean is a source of jobs and food for millions of people, a home for countless marine species, and a regulator of the planet's climate, mitigating the impacts of climate change.
World Cleanup Day
On 8 December 2023, the United Nations General Assembly, in its seventy-eighth session, unanimously adopted resolution 78/122 “World Cleanup Day”, which proclaims 20 September as World Cleanup Day.
The resolution invites all Member States, organizations of the United Nations system, other international and regional organizations, and other relevant stakeholders – including civil society, the private sector and academia – to observe…
European Mobility Week
European Mobility Week is the European Commission’s flagship awareness-raising campaign on sustainable urban mobility. It promotes behavioural change in favor of active mobility, public transport, and other clean, intelligent transport solutions.
The main event takes place from 16 to 22 September each year, culminating in the popular Car-Free Day. Local authorities are encouraged to use this week to test innovative planning measures,…
13th International Conference on Sustainable Development
The 13th International Conference on Sustainable Development (ICSD) will be held on the theme, ‘Creating a Unified Foundation for Sustainable Development: Research, Practice, and Education’. The Conference aims to bring together individuals from research, policy, practice, and business to share ideas, present research fundings, and discuss professional issues relevant to sustainability science.
80th Session of the UN General Assembly (UNGA 80)
The 80th session of the UN General Assembly (UNGA 80) will open on Tuesday, 9 September 2025. The first day of the high-level General Debate will be Tuesday, 23 September 2025.
Second Africa Climate Summit
The Second Africa Climate Summit aims to redefine Africa’s aspirations for a climate-resilient and prosperous future. The Summit will focus on the theme, ‘Accelerating Global Climate Solutions: Financing for Africa’s Resilient and Green Development’.The Second Africa Climate Summit aims to redefine Africa’s aspirations for a climate-resilient and prosperous future. The Summit will focus on the theme, ‘Accelerating Global Climate Solutions:…
World Humanitarian Day
World Humanitarian Day is commemorated every year on 19 August to pay tribute to humanitarian workers killed and injured in the course of their work, and to honor all aid and health workers who continue to provide life-saving support and protection to people most in need. The Day highlights the importance, effectiveness, and positive impact of humanitarian work.
International Youth Day
International Youth Day is celebrated annually on 12 August to bring youth issues to the attention of the international community and celebrate the potential of youth as partners in today’s global society.
The Day gives an opportunity to celebrate and mainstream young peoples’ voices, actions, and initiatives, as well as their meaningful, universal, and equitable engagement. The UN General Assembly (UNGA) established the Day on 17…
ASEAN Sustainable Urbanization Forum (ASUF)
The ASEAN Sustainable Urbanisation Forum (ASUF) 2025 stands as a landmark event, being the first urban forum hosted by an ASEAN Chair. This forum underscores the pressing need for a collaborative and unified approach to tackle the complex challenges posed by urbanization in the region.
Among its key focus is to strengthen local policy frameworks, promote innovative mechanisms and harness new technology for the development of inclusive…
International Day of the World’s Indigenous Peoples
The International Day of the World’s Indigenous Peoples takes place annually on 9 August to celebrate Indigenous Peoples and their knowledge and raise awareness of the needs of these groups. The Day highlights rights of Indigenous Peoples to make their own decisions and carry them out in ways that are meaningful and culturally appropriate to them.
Third UN Conference on LLDCs
The Third UN Conference on Landlocked Developing Countries (LLDCs) will explore innovative solutions to challenges faced by LLDCs and build meaningful, strategic partnerships to unlock the potential of LLDCs. The Conference will convene under the theme, ‘Driving Progress Through Partnerships’.
High-Level Political Forum on Sustainable Development
The High-level Political Forum on Sustainable Development (HLPF) will be convened from Monday, 14 July, to Wednesday, 23 July 2025, under the auspices of the Economic and Social Council. This includes the three-day ministerial segment of the forum from Monday, 21 July, to Wednesday, 23 July 2024, as part of the High-level Segment of ECOSOC.
The theme of the HLPF is “Advancing sustainable, inclusive, science- and evidence-based…
World Population Day
World Population Day is celebrated annually on 11 July to focus attention on the urgency and importance of population issues.
WSIS+20 High-level Event
The World Summit on the Information Society (WSIS) is an existing multistakeholder United Nations (UN) process on digital governance and cooperation with a vision of fostering people-centered, inclusive, and development-oriented information and knowledge societies.