Flag of Hong Kong Kong was granted on 21 January 1959 by the College of Arms in London. The Hong Kong flag was revised in the same year to feature the coat of arms in the Blue Ensign flag. This design was used officially from 1959 until Hong Kong's transfer of sovereignty in 1997. Since then, the colonial flag has been appropriated by protestors, such as on the annual 1 July marches for universal suffrage, as a "symbol of antagonism towards the mainland", along with a blue flag featuring the coat of arms, used by those advocating independence. Before Hong Kong's transfer of sovereignty,
British Hong Kong franchise to include them. The Sino-British Joint Declaration was signed by both the Prime Minister of the United Kingdom and the Premier of the People's Republic of China on 19 December 1984 in Beijing. The Declaration entered into force with the exchange of instruments of ratification on 27 May 1985 and was registered by the People's Republic of China and United Kingdom governments at the United Nations on 12 June 1985. In the Joint Declaration, the People's Republic of China Government stated that it had decided to resume the exercise of sovereignty over Hong Kong (including Hong Kong Island, Kowloon,