Public Radio Broadcasting Day is observed worldwide every January 13, commemorating the first broadcast of a live performance featuring Italian tenor Enrico Caruso from the Metropolitan Opera House in 1910. This event was part of an experiment conducted by radio pioneer Lee de Forest, marking a significant moment in the evolution of radio broadcasting. Initially, radio technology focused on telegraphy, but with advancements such as de Forest's invention of the electronic amplifier in 1906, audio broadcasts became possible. The day celebrates the contributions of early radio innovators and encourages people to engage with their favorite radio stations and share their experiences on social media using the hashtag #PublicRadioBroadcastingDay. It is important to note that this observance is distinct from World Radio Day, which is celebrated on February 13.