International Day of Engagement in Science for Sustainable Development2026 · Date · History · Messages
Proclaimed by UNESCO General Conference in 2025
About International Day of Engagement in Science for Sustainable Development
The International Day of Engagement in Science for Sustainable Development is observed on 27 November. UNESCO proclaimed it to encourage wider participation in science and stronger connections between scientific knowledge, citizens and sustainable-development decisions.
The Day is linked institutionally to UNESCO’s leadership of the International Decade of Sciences for Sustainable Development, 2024–2033, but it is a distinct annual observance established by the General Conference in 2025.
Why International Day of Engagement in Science for Sustainable Development matters
Science engagement is broader than communicating research results. It includes opportunities for citizens, young people, educators, researchers and decision-makers to exchange knowledge, ask questions and participate in evidence-informed problem solving.
For sustainable development, that engagement can help communities understand trade-offs, strengthen scientific literacy and connect research capacity with practical challenges in health, climate, biodiversity, technology and social development.
History of International Day of Engagement in Science for Sustainable Development
Ukraine advanced the initiative for an annual international day focused on engagement in science for sustainable development.
At its 43rd session, UNESCO’s General Conference adopted 43 C/Resolution 24 on 12 November 2025 and proclaimed 27 November as the annual International Day of Engagement in Science for Sustainable Development.
The resolution encourages UNESCO’s Director-General to promote the Day in connection with UNESCO’s leadership of the International Decade of Sciences for Sustainable Development, 2024–2033.
Official Ukrainian material records 27 November 2025 as the first time the new international day was observed.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Ukraine
The Government of Ukraine describes the proclamation as the adoption of Ukraine’s initiative.
UNESCO General Conference
43 C/Resolution 24
First documented observance
An official Ukrainian public authority states that the world marked the new Day for the first time on 27 November 2025.
UNESCO
Resolution 24 encourages the Director-General to promote the observance in connection with UNESCO’s leadership of the International Decade of Sciences for Sustainable Development.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
3 fields not established in reviewed sources
How to Observe International Day of Engagement in Science for Sustainable Development
Organize a public discussion where researchers explain a local sustainability problem, the evidence available and the remaining uncertainties.
Create opportunities for students or community groups to ask scientists how research questions are chosen, tested and revised.
Highlight citizen-science or open-science projects where people can contribute observations, data or local knowledge under clear research protocols.
Pair claims about sustainability with transparent sources and distinguish established evidence from hypotheses or unresolved questions.
International Day of Engagement in Science for Sustainable Development Facts
The Day is observed on 27 November.
UNESCO established it through 43 C/Resolution 24 in 2025.
Ukraine advanced the initiative.
UNESCO links the observance to the International Decade of Sciences for Sustainable Development, 2024–2033.
Official Ukrainian material identifies 27 November 2025 as the first observance.
International Day of Engagement in Science for Sustainable Development Messages
Wishing everyone observing International Day of Engagement in Science for Sustainable Development a day of reflection, constructive dialogue and purposeful follow-through.
On International Day of Engagement in Science for Sustainable Development, may awareness lead to informed discussion, practical action and respect for the communities at the heart of the observance.
May International Day of Engagement in Science for Sustainable Development encourage thoughtful participation, shared responsibility and action that continues after the observance ends.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
UNESCO Records of the General Conference, 43rd session, Volume 1: Resolutions (opens in a new tab)
Government of Ukraine — UNESCO approves Ukraine’s initiative to declare 27 November as International Day of Engagement in Science for Sustainable Development (opens in a new tab)
National Council of Television and Radio Broadcasting of Ukraine — first observance on 27 November 2025 (opens in a new tab)
UNESCO — International Day of Engagement in Science for Sustainable Development (opens in a new tab)
Dedicated Authoritative Page
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is International Day of Engagement in Science for Sustainable Development?
27 November The documented recurrence rule is: 27 November.
Does International Day of Engagement in Science for Sustainable Development fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is International Day of Engagement in Science for Sustainable Development an official public holiday?
The reviewed sources verify it within this scope: UNESCO international day. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes International Day of Engagement in Science for Sustainable Development?
The reviewed sources identify UNESCO General Conference as the proclaiming or establishing body. The proposer or originator is recorded separately as Ukraine. Current facilitation or coordination is recorded as UNESCO.
Is International Day of Engagement in Science for Sustainable Development international or country-specific?
The documented scope is international or global: UNESCO international day. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-09-05.
When is the International Day of Engagement in Science for Sustainable Development?
It is observed every year on 27 November.
Who established it?
UNESCO’s General Conference proclaimed it in 2025 through 43 C/Resolution 24.
What is the Day intended to promote?
It promotes wider engagement in science and stronger links between scientific knowledge, society and sustainable development.
Other observances on November 27
These observances are also listed on November 27, 2026.
International Systems Engineer Day
The observance’s creator site states that it was founded in 2012 and is celebrated annually on the last Friday of November.
National Craft Jerky Day
National Day Calendar identifies Long Beach Jerky Co. as founder, states that November 27 honors “Gramps” Albert’s birthday, and records private registrar approval in 2016; the approval is…