November 3, 2017 all-day
Nov 3, 1906. On this date the Second International Radio Telegraphic Conference at Berlin, Germany, proposed a new wireless distress signal: SOS. After its use during the sinking of the Titanic in 1912, SOS became the standard distress signal at sea. No longer used as a maritime distress signal since 1999, SOS is still a widely recognized code.