The following information is courtesy of the International Marconi Day website.
International Marconi Day celebrates the huge part Guglielmo Marconi played in the invention of radio.
International Marconi Day (IMD) is a 24-hour Amateur Radio event that is held annually to celebrate the birth of Marconi on April 25, 1874. The event is usually held on the Saturday closest to Marconi’s birthday and in 2017 it will be held on April 22.
Period of Operation: April 22, 2017 from 0000 UTC to 2359 UTC
The purpose of the day is for Amateur Radio enthusiasts around the world to make contact with historic Marconi sites using communication techniques similar to those used by Marconi himself. Registered Stations must operate from a site which has a connection with Marconi.
For more information on International Marconi Day visit http://gx4crc.com/gb4imd/