April 22, 2023 is Marconi Day and honors Guglielmo Marconi, inventor of the radiotelegraph and wireless transmission. The day is celebrated on the Saturday closest to April 25 each year.
http://www.rcarc.org/imdhist.htm
https://www.hsm.ox.ac.uk/event/marconi-day-2023
https://gx4crc.com/gb4imd/