2024 is the next leap year Roman General Julius Caesar implemented the first leap year

202BC Liu Bang was enthroned as the Emperor of China beginning 4 centuries of the Han dynasty 1972 opening US and China relations the Shanghai Communique was signed

1870 the current flag of Japan was first adapted as the nation flag for Japanese Merchant ships 1900 Football Club Bayern Machen was founded

1616 Galileo Galilei was formally banned by the Roman Catholic Church from teaching or defending his view that the earth orbits the sun 1919 President Woodrow Wilson signed the Act of Congress declaring the Grand Canyon a National Park

1836 Samuel Colt was granted a patent for his revolver firearm in the United States 1991 the disbandment of the Warsaw Pact was completed from a meeting in Budapest Hungary

1920 the Nazi Party was founded by Adolf Hitler in the Hofbrauhaus beer hall in Munich Germany 2007 Japan launched its 4th spy satellite to monitor North Korea