World Logic Day2026 · Date · History · Messages · Quotes
Proclaimed by UNESCO in 2019
About World Logic Day
World Logic Day is observed on 14 January. UNESCO’s General Conference proclaimed it in 2019 through 40 C/Resolution 38, in association with the International Council for Philosophy and Human Sciences (CIPSH).
The day promotes public understanding of logic, critical reasoning, teaching and research while recognizing that traditions of reasoning have developed across many civilizations.
Why World Logic Day matters
Logic underpins work in philosophy, mathematics, computer science, linguistics and many forms of structured argument. The observance can make those connections accessible without reducing logic to puzzles alone.
UNESCO also links the day with international cooperation, education, science, dialogue and a culture of peace, giving it a broader role than celebration of one academic discipline.
History of World Logic Day
An independently organized first World Logic Day was held on 14 January 2019 before UNESCO’s formal proclamation, with events in many locations.
The initiative was advanced through UNESCO’s institutional process during 2019. At the 40th General Conference, UNESCO examined document 40 C/74 and adopted 40 C/Resolution 38 on 26 November 2019.
The resolution proclaims 14 January every year as World Logic Day in association with CIPSH and asks UNESCO’s Director-General to work closely with CIPSH in encouraging and publicizing initiatives.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
First World Logic Day
The organizer-led first edition preceded the UNESCO General Conference proclamation later in 2019 and provided the initiative that was advanced through UNESCO’s institutional process.
Jean-Yves Beziau / Logica Universalis initiative, advanced to UNESCO through Brazil
The initiative’s official organizer history identifies Jean-Yves Beziau as creator/organizer of the 2019 World Logic Day and describes the subsequent presentation through Brazil’s UNESCO representation. This is supporting organizer evidence, not a substitute for the formal UNESCO resolution.
UNESCO General Conference
UNESCO General Conference 40 C/Resolution 38
First documented observance
The official initiative history explicitly identifies 14 January 2019 as the First World Logic Day, organized in about 60 locations worldwide before UNESCO’s formal proclamation later that year.
UNESCO in association with the International Council for Philosophy and Human Sciences (CIPSH)
The resolution proclaims the day in association with CIPSH and asks the Director-General to work closely with CIPSH on initiatives.
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
Predecessor and precursor observances
Earlier or merged observances are kept separate from former names and later institutional actions.
How to Observe World Logic Day
Run a short reasoning workshop that distinguishes valid structure from whether a premise is actually true.
Compare examples of logical reasoning from philosophy, mathematics, computing or another discipline.
Host a debate or argument-mapping exercise that rewards clarity, evidence and charitable interpretation rather than point-scoring.
Explore how algorithms rely on formal rules while discussing the limits of automated reasoning in real-world decisions.
World Logic Day Facts
World Logic Day is observed on 14 January.
UNESCO’s General Conference adopted 40 C/Resolution 38 on 26 November 2019.
The Conference examined document 40 C/74; that document number is not the resolution number.
The UNESCO proclamation is explicitly associated with CIPSH.
A first independently organized World Logic Day took place on 14 January 2019 before UNESCO’s proclamation.
World Logic Day Messages
Happy World Logic Day! May World Logic Day invite fresh curiosity about the traditions, ideas and people connected with this occasion.
Celebrate World Logic Day by learning something new, sharing what you enjoy and inviting someone else into the experience.
May World Logic Day spark fresh ideas, thoughtful conversation and a little more curiosity about the subject behind the day.
World Logic Day is a good excuse to slow down, explore the topic and enjoy the people, stories or traditions connected with it.
Wishing everyone marking World Logic Day a day filled with curiosity, creativity and meaningful discovery.
World Logic Day Quotes
“The discipline of logic is utterly vital to our societies and economies.”
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 General Conference — Records of the 40th session, 40 C/Resolution 38 / document 40 C/74 (opens in a new tab)
International Council for Philosophy and Human Sciences / World Logic Day context (opens in a new tab)
Logica Universalis — first World Logic Day and proposal history (opens in a new tab)
UNESCO — World Logic Day (opens in a new tab)
Dedicated Authoritative Page
Logica Universalis — first World Logic Day, 14 January 2019 (opens in a new tab)
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 World Logic Day?
14 January The documented recurrence rule is: 14 January.
Does World Logic Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is World Logic Day 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 World Logic Day?
The reviewed sources identify UNESCO General Conference as the proclaiming or establishing body. The proposer or originator is recorded separately as Jean-Yves Beziau / Logica Universalis initiative, advanced to UNESCO through Brazil. Current facilitation or coordination is recorded as UNESCO in association with the International Council for Philosophy and Human Sciences (CIPSH).
Is World Logic Day 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 did UNESCO proclaim World Logic Day?
UNESCO’s General Conference adopted 40 C/Resolution 38 on 26 November 2019.
Was there a World Logic Day before UNESCO proclaimed it?
Yes. The initiative’s organizer documents a first World Logic Day on 14 January 2019, before the UNESCO proclamation later that year.
Who works with UNESCO on World Logic Day?
The UNESCO resolution proclaims the day in association with the International Council for Philosophy and Human Sciences (CIPSH).
Other observances on January 14
These observances are also listed on January 14, 2027.
National Dress Up Your Pet Day
Pet-lifestyle advocate Colleen Paige lists National Dress Up Your Pet Day on 14 January, and observance registries attribute its creation to her.