(1) To encourage the development of logical research.
(2) To foster and strengthen interactions between people having interest for logic.
(3) To make better known logic among researchers of all fields on location.
(4) To make the work of logicians on location better known. Information will be put on this website and will be seen worlwide.
(5) To develop, promote and make better known logic in the world.


(1) Plan logical activities for January 14: a lecture, a workshop, an informal gathering, a logic tea party, a virtual event ...
(2) Build a webpage with this information, it we be linked below.
(3) Advertise and promote the event.
(4) Prepare the technical and practical details.
(5) Meet on location January 14, 2019.




Dept of Philosophy, University of Warsaw, Poland
Dept of Logic, University of Łódź, Poland
Adam Mickiewicz University in Poznań, Poland
Dept of Logic, University of Wrocław, Poland
Dept of Logic and Dept of Cognitive Science, Nicolaus Copernicus University, Toruń, Poland
Jan Dlugosz University in Czestochowa, Poland
Department of Social Sciences of the University of Information Technology and Management in Rzeszow and the Institute of Philosophy of the University of Rzeszow, Poland
Dept of Mathematics of Silesian University in Katowice, Poland

Federal Fluminense University and Brazilian Academy of Philosophy, Rio de Janeiro, Brazil
University of São Paulo, São Paulo Brazil
University of Brasilia, Brasilia, Brazil
UNICAMP, Campinas, Brazil

Stanford University, California, USA
St. John Fisher College, Rochester, NY, USA
Louisiana Scholars' College at Northwestern State University, Natchitoches, LA, USA

Dept of Logic, Institute of Philosophy, St Petersburg State University, Russia
Dept of Algebra and Mathematical Logic and Youth Center IM&CS, Siberian Federal University, Krasnoyarsk, Siberia, Russia
International Laboratory for Logic, Linguistics and Formal Philosophy of Higher School of Economics, Dept of Logic of the Faculty of Philosophy of Moscow State University, and Dept of Logic of Institute of Philosophy Russian Academy of Sciences, Moscow, Russia
Innopolis University, Innopolis, Republic of Tatarstan, Russia
Philosophy Department, Ulyanovsk State University, Russia
Novisibirsk State University, Russia

Turkish Logic Society and Institute of Logic, University of Istanbul, Turkey

Communiqué for World Logic Day by Teo Grünberg

Pontifical Lateran University, Vatican

the Set theory, logic and topology department of the Alfred Rényi Institute of Mathematics and the Department of Logic of Eötvös Loránd University, Budapest, Hungary

Dept of Philosophy, University of Tunis, Tunisia

Dept of Mathematical Logic and its Applications, Sofia University, Bulgaria

Sivatosh Mookerjee Science Centre, Sir Asutosh Mookerjee Memorial Institute, Kolkata & Calcutta Logic Circle, West Bengal, India

Institute of Philosophy, Zagreb, Croatia

Logical Education Association, Florence, Italy
Patrizio Paoletti Foundation for Development and Communication, Assisi, Italy

ALOPHIS, University of Cagliari, Cagliari, Italy

Technical University of Athens, Greece

Department of Mathematics & Computer Science,
Amirkabir University-Tehran Polytechnic, Iran

UNAM, Mexico

Technological University of the Mixteca, Huajuapan de León, Oaxaca, Mexico

Benemérita Universidad Autónoma de Puebla, Mexico

Dept of Philosophy, Humboldt University, Berlin, Germany

University of Hagen, Hagen and Leipzig, Germany

Dept of Mathematics, Instituto Superior Técnico, University of Lisbon, Portugal

University of Salamanca, Spain

University of Montpellier and LIRMM, Montpellier, France

Telecom, Paris, France

Zhejiang University, China

Dept of Philosophy, Pontifical University of Santiago, Chile

Yuan Ze University, Taiwan

Bogotá Logic Group, Universidad Nacional de Colombia at Bogotá and Universidad de los Andes at Bogotá, Colombia

Centre for Logic and Philosophy of Science, University of Ghent, Belgium

Technical University of Denmark (DTU Compute), Denmark

Moulay Ismail University, Morocco

Masaryk University, Brno, Czech Republic

Dept of Mathematics, Nazarbayev University, Astana, Kazakhstan

UQAM, Québec, Canada

Department of Philosophy, University of British Columbia, Vancouver, Canada

Department of Philosophy, University of Lethbridge, Alberta, Canada

Institute of Mathematics and Computer Science, State University of Moldova, Chisinau, Moldova

University of Iasi, Romania

Pontifical Catholic University of Lima, Peru

Umm al-Qura University, Mecca, Saudi Arabia

Swansea University, UK

Taras Shevchenko National University of Kyiv, Ukraine

The logo of the Logic Day is connected with the one of the Esperanto.

The question of a universal language was popular among logicians at the turn of the 20th century. Giuseppe Peano created one, Latino sine flexione, Louis Couturat another one, Ido, and Rudolf Carnap was fluently speaking Esperanto as explained in his intellectual autobiography.

The idea of Ludwik Lejzer Zamenhof, creator of Esperanto, was to promote peace and understanding among human beings by the development of an artificial universal language. This did not work. English is itself being used as a universal language and it makes sense if we consider some of its typical features, already pointed out at the end of the 19th century by Michel Bréal, who established "semantics", and who was the teacher of Ferdinand de Saussure.

But more important than a universal language is human reason which is itself by nature universal and that's an excellent reason to promote logic. Nowadays few people know what logic is. And there are various reasons for that, in particular because it is spread in various departments and most of the time there are no interactions within a given university between people working in logic in a computer science department, a math department, a philosophy department, a linguistics department. And for the layman logic merely reduces to the adjective "logical", he has no idea that logic is a science.

Logic is not one field among others. If we take logic seriously, as the study of reasoning, and if we consider that reasoning is the distinctive feature of human beings, considered as rational animals since the antiquity ("logical" animals originally in Greek), then logic is something really special. The World Logic Day is the celebration of humanity.