World Logic Day
Next: January 14, 2027
Think it through, together.
The story
Where it comes from
On 26 November 2019, UNESCO's General Conference proclaimed 14 January World Logic Day, to bring the history and everyday importance of logic, the study of how we reason, to a wider public. The idea came from logicians themselves: the first World Logic Day was held that January in about 60 cities, and Brazil then put the proposal to UNESCO. The date honours two of the great logicians of the twentieth century: Kurt Gödel died on 14 January 1978, and Alfred Tarski was born on 14 January 1901.
How it's celebrated
Universities, schools, research institutes and logic societies hold lectures, workshops, puzzle sessions and public talks, coordinated by the International Council for Philosophy and Human Sciences (CIPSH), which keeps an archive of each year's events around the world. At home it is a good day for a logic puzzle, a game of chess or a long argument, settled kindly.
Did you know
- UNESCO points out that computer science and digital technology are rooted in logical and algorithmic reasoning.
- The first World Logic Day in 2019 was organised by the Logica Universalis Association and its editor, Jean-Yves Béziau.
- China, India and Kazakhstan were among the countries that took part in the very first celebration.
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