1582 - Pope Gregory XIII announces New Style (Gregorian) calendar.
1819 – American Congress ratified the contract, under which Spain had given Florida to USA.
1863 - Arizona is organized as a United States territory.
1887 - Established telephone connection between Paris and Brussels.
1981 - An earthquake registering 6.7 on the Richter scale hits Athens , killing 16 people and destroying buildings in several towns west of the city.
1974 - Pakistan officially recognizes Bangladesh.
2011 - Launch of Discovery, NASA's final Launch of Space Shuttle Discovery (OV-103).

45 BC - The new calendar, now known as the Julian calendar, is starting to apply.
1502 - The Portuguese discover the Ri de Janeiro.
1610 - German astronomer Simon Marius reveals Jupiter's moons, but does not officially announce it. That's what Galileo did on July 1, 1610.
1700 - Protestant Western Europe (except England) begins to use the Gregorian calendar.
1801 - Cerera, the first known asteroid discovered by Giuseppe Piazzi.
1804 - Independence of Haiti from France.
1880 - Ferdinand Lesseps began building the Panama Canal.
1907 - For the first time, the New Year is celebrated at Times Square in New York.
1925 - The capital of Norway changed its name to today's Oslo. The previous name, Christiania, was worn from 1624.
2002 - The euro began to be used in most European Union member states.

1520 - A strong storm strikes Friesland, the Netherlands.
1795 - Curacao government bans slave labor on Sunday.
1820 - A whale of 80 tonne attacks the Essex ship at 2,000 miles from the west coast of Nantucket, Massachusetts. The film Moby Dick by Herman Melville from 1851 is inspired by this event.
1833 - Charles Darwin reached Punta Gorda, sees the Rio River in Uruguay.
1866 - Founded Howard University, Washington.
1917 - The Republic of Ukraine was declared.
1998 - The first module of the Inner-Space Space Station, Zarya, was launched.
Industrialization Day of Africa
International Children's Day

1493 - Christopher Columbus goes ashore on an island he first saw the day before. He names it San Juan Bautista (later renamed Puerto Rico). 
1816 - Warsaw University is established.
1824 - Storm causes St Petersburg flood, killing 10,000
1881 - A meteorite lands near the village of Großliebenthal, southwest of Odessa, Ukraine.
1969 - Apollo 12's Conrad & Bean become 3rd & 4th humans on Moon
World Philosophy Day
International Men's Day

1493 - Christopher Columbus first sights the island now known as Puerto Rico.
1497 - Portuguese navigator Vasco da Gama reaches the Cape of Good Hope
1820 - Antarctica sighted by US Navy Capt Nathaniel B Palmer
1903 - Hay-Bunau-Varilla Treaty gives US exclusive canal rights in Panama
1918 - Latvia declares independence from Russia
1956 - Morocco gains independence.