Marconi's elegant sailing yacht, the Elettra, commandeered and refitted as a warship by the German Navy, was sunk by the RAF.

A religious ceremony for Marconi's marriage to Maria Cristina Bezzi-Scali was performed.

Marconi married Maria Cristina Bezzi-Scali in a civil service.

Marconi's marriage to Beatrice O'Brien was annulled, enabling him to remarry.

Marconi and Beatrice O'Brien divorced in the free city of Fiume (Rijeka).

The New Street Works factory in Chelmsford was the location for the first entertainment radio broadcasts in the United Kingdom.

The sinking of the RMS Lusitania further demonstrated the significance of Marconi's wireless technology during maritime disasters.

Marconi gave evidence to the Court of Inquiry into the loss of the Titanic regarding the marine telegraphy's functions and the procedures for emergencies at sea.

The sinking of the RMS Titanic highlighted the role of Marconi's wireless technology in maritime rescues. Radio operators Jack Phillips and Harold Bride transmitted distress signals that led to the rescue of survivors by the RMS Carpathia. This event significantly raised public awareness of the value of radio.

A regular transatlantic radio-telegraph service was finally begun between Clifden, Ireland, and Glace Bay, Nova Scotia. This marked the commencement of commercial transatlantic wireless communication.

Guglielmo Marconi married Beatrice O'Brien, a daughter of The 14th Baron Inchiquin. This marriage was significant in Marconi's personal life and social standing.

A message of greetings was sent by Marconi from United States President Theodore Roosevelt to King Edward VII of the United Kingdom, from the Marconi station near South Wellfleet, Massachusetts.

A transmission from the Marconi station in Glace Bay, Nova Scotia, Canada, became the world's first radio message to cross the Atlantic from North America.

Marconi claimed to have received a message at Signal Hill in St. John's, Newfoundland, transmitted from Poldhu, Cornwall, England, a distance of about 2,200 miles (3,500 km). This was heralded as the first transatlantic radio transmission, although there was considerable skepticism about the claim. This date marked a potentially significant step towards long-distance wireless communication, pending confirmation.

The Marconi Wireless Company of America, the world's first radio company, was incorporated in Roselle Park, New Jersey. This marked a significant milestone in the commercialization of radio technology and the establishment of Marconi's business interests in the United States.

Marconi sent the first ever wireless communication over the open sea, transmitting a message over the Bristol Channel from Flat Holm Island to Lavernock Point near Cardiff, a distance of 3 miles (4.8 km). The message read "Are you ready". This event demonstrated the practical potential of wireless telegraphy for maritime communication.

Marconi applied for a British patent, number 12039, titled "Improvements in Transmitting Electrical impulses and Signals, and in Apparatus therefor". This was the first patent for a communication system based on radio waves, marking a crucial step in establishing Marconi's claims to the invention and development of radio technology.

Giuseppe Marconi, Guglielmo Marconi's father, a widower, married Annie Jameson, Guglielmo's mother, in Boulogne-sur-Mer, France. This marriage was significant as it brought together the Italian and Irish heritage that would influence Guglielmo's life and career.