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Wikipedia:On this day/Today. Wikipedia:Selected anniversaries/May 21 [ talk · edit · history ] May 21: World Day for Cultural Diversity for Dialogue and Development. 1138 – The Crusades: The siege of Shaizar ended, and the Emir of Shaizar became a vassal of the Byzantine Empire. 1864 – American Civil War: The inconclusive Battle of ...
Common Era. Common Era ( CE) and Before the Common Era ( BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar ), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the original Anno Domini (AD) and Before Christ (BC) notations used for the same calendar era.
The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
Wikipedia:Current date and time - Wikipedia. Wikipedia:Current date and time. "WP:TODAY" redirects here. For the guideline on wording like "today" and "recently", see Wikipedia:Manual of Style/Words to watch § Relative time references. Today is Thursday, May 30, 2024. The time is 16:14 (UTC). ( refresh )
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history. For events from c. 500 – c. 1499, see: Timeline of post-classical history. For events from c. 1500, see: Timelines of modern history.
1971: Place cells in the brain are discovered by John O'Keefe. 1974: Russell Alan Hulse and Joseph Hooton Taylor, Jr. discover indirect evidence for gravitational wave radiation in the Hulse–Taylor binary. 1977: Frederick Sanger sequences the first DNA genome of an organism using Sanger sequencing.
February 1. February 1 is the 32nd day of the year in the Gregorian calendar; 333 days remain until the end of the year (334 in leap years ).
January 19 is the 19th day of the year in the Gregorian calendar; 346 days remain until the end of the year (347 in leap years ).