1997-Jul-01 The United Kingdom returned Hong Kong to the People's Republic of China
1921-Jul-01 The Communist Party of China (CPC) was formed, and Chen Duxiu was elected its leader
1863-Jan-01 President Abraham Lincoln signed the Emancipation Proclamation
1990-Jan-03 Panamanian dictator Noriega surrendered to the United States
2003-Jun-10 The Spirit Rover was launched by NASA to start the Mars Exploration Rover mission
1921-Jul-01 The Communist Party of China (CPC) was formed, and Chen Duxiu was elected its leader
2002-Jan-02 The Legislative Assembly appointed Eduardo Duhalde as interim President of Argentina
1996-Mar-17 Sri Lanka won the Cricket World Cup
1903-Dec-17 Innovation of the aeroplane
1807-Aug-17 Innovation of the steamboat
1956-Mar-03 Dutch swimmer Cockie Gastelaars broke two decades' world record for 100m freestyle
1924-Dec-30 Astronomer Edwin Hubble formally announced that the Milky Way is just one of many galaxies in the universe
1767-Dec-28 King Taksin was crowned King of Thailand (Siam)
1836-Dec-28 Spain recognized the independence of Mexico by signing the Santa María–Calatrava Treaty
1945-Oct-24 The United Nations was officially established
1808-Jan-01 The slave trade became illegal when the United States enacted a law banning the importation of slaves
1999-Jan-01 The Euro became the official currency in 11 European countries