When did the Transfer of sovereignty over Hong Kong happen?
1994 Hong Kong electoral reform: The 1994 Hong Kong electoral reform was a set of significant constitutional changes in the last years of British colonial rule in Hong Kong before the handover of its sovereignty to the People's Republic of China on 1 July 1997. Transfer of sovereignty over Hong Kong: The transfer of sovereignty over Hong Kong from the United Kingdom to China, referred to as "the Handover" internationally or "the Return" in China, took place on 1 July 1997.
1 July 1997.