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2015 (Wednesday) January 21 is the 21st day of the year in the Gregorian calendar; 344 days remain until the end of the year (345 in leap years ).
In the Gregorian calendar, New Year's Day is the first day of the calendar year, 1 January.Most solar calendars (like the Gregorian and Julian) begin the year regularly at or near the northern winter solstice, while cultures and religions that observe a lunisolar or lunar calendar celebrate their Lunar New Year at less fixed points relative to the solar year.
January 21. Members of the First Dáil. 763 – The Abbasid Caliphate crushed the Alid revolt when a rebel leader was mortally wounded in battle near Basra in present-day Iraq. 1789 – The Power of Sympathy by William Hill Brown, widely considered to be the first American novel, was published.
Annual. Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries. [2] [1] [3]
Daniel McCallum (21 January 1815 – 27 December 1878) was a Scottish-born American railroad engineer, general manager of the New York and Erie Railroad, and a brevet major general in the Union Army during the American Civil War. He is known as one of the early pioneers of management; in 1855, he designed an illustrative organization chart of ...
On this day. January 21: Martin Luther King Jr. Day in the United States (2019) The First Dáil Éireann. 763 – The Abbasid Caliphate crushed the Alid revolt when one of the rebel leaders was mortally wounded in battle near Basra, in what is now Iraq. 1789 – The Power of Sympathy by William Hill Brown, widely considered to be the first ...
1941 – World War II: Sparked by the murder of a German officer on the previous day in Bucharest, Romania, members of the Iron Guard began a rebellion and pogrom. 1968 – Cold War : A B-52 bomber carrying four nuclear weapons crashed onto sea ice near Thule Air Base , Greenland, causing localized radioactive contamination .
The history of photography began with the discovery of two critical principles: The first is camera obscura image projection, the second is the discovery that some substances are visibly altered by exposure to light. There are no artifacts or descriptions that indicate any attempt to capture images with light sensitive materials prior to the ...