World Logic Day: 14 January
"On 26 November 2019, the 40th General Conference
of UNESCO proclaimed 14 January to be World Logic Day,
a global day of supporting the development of logic through
teaching and research, as well as to [sic] public dissemination of
the discipline. The date chosen to celebrate World Logic Day,
14 January, corresponds to the date of death of Kurt Gödel . . . ."
— https://wld.cipsh.international