Historical Events on December 19

21 significant historical events occurred on December 19. December 19 has seen several major geopolitical events and tragedies in modern history. On this date, India annexed Goa in 1961, and the Sino-British Joint Declaration about Hong Kong's transfer was signed in 1984. In 2016, the day marked the Berlin Christmas market attack and the assassination of Russian Ambassador Andrei Karlov in Turkey.