My Microsoft p.c.'s tool bar tells me this morning that this is 'World Radio Day'. I don't recall hearing of this before.
A quote from Wikipedia:
"World Radio Day (French: Le jour mondial de la radio) is an international day celebrated on the 13th of February each year. The day was designated by UNESCO on the 3rd of November, 2011, during its 36th conference."
The whole Wikipedia entry:
https://en.wikipedia.org/wiki/World_Radio_Day
