June 23
June 23 is the 175th day of the year in the Gregorian calendar; 191 days remain until the year's end. It falls in summer (northern hemisphere) and under the astrological sign of Cancer.
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Astronomy
On June 23 the Sun's declination is approximately +23.4°. At this latitude the Sun is north of the celestial equator, giving the Northern Hemisphere longer days than nights.
For specific rise/set times at your location, see the U.S. Naval Observatory, or the NASA APOD archive for any imagery published on a June 23.
Position in the year
Holidays & observances
- United Nations Public Service Day
Events
A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.
1314 — The Battle of Bannockburn began; Robert the Bruce defeated the English the next day. ↗(712 years ago)more
The Battle of Bannockburn was fought on 23–24 June 1314, between the army of Robert the Bruce, King of Scots, and the army of King Edward II of England, during the First War of Scottish Independence. It was a decisive victory for Robert Bruce and formed a major turning point in the war, which ended 14 years later with the de jure restoration of Scottish i...
1611 — English explorer Henry Hudson, his son and seven loyal crew members were set adrift in Hudson Bay by his mutinous crew. ↗(415 years ago)more
Henry Hudson was an English sea explorer and navigator during the early 17th century, best known for his explorations of present-day Canada and parts of the Northeastern United States.
1868 — Christopher Latham Sholes was granted a patent for the typewriter. ↗(158 years ago)more
A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element.
2016 — The United Kingdom voted in a referendum to leave the European Union ("Brexit"). ↗(10 years ago)more
The 2016 United Kingdom European Union membership referendum, commonly referred to as the EU referendum or the Brexit referendum, was a referendum that took place on 23 June 2016 in the United Kingdom (UK) and Gibraltar under the provisions of the European Union Referendum Act 2015 to ask the electorate whether the country should continue to remain a memb...
Notable births
1894 — Edward VIII of the United Kingdom. ↗(132 years ago)more
Edward VIII, later known as the Duke of Windsor, was King of the United Kingdom and the British Dominions, and Emperor of India, from 20 January 1936 until his abdication in December of the same year.
1912 — Alan Turing, English computer scientist and codebreaker. ↗(114 years ago)more
Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. He was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purp...
Notable deaths
1995 — Jonas Salk, developer of the polio vaccine. ↗(31 years ago)more
Jonas Edward Salk was an American virologist and medical researcher who developed one of the first successful polio vaccines. He was born in New York City and attended the City College of New York and New York University School of Medicine.
Numerical & calendrical curiosities
| Day-of-year (175) | 5^2 × 7 · composite (no) |
|---|---|
| Days remaining (191) | 191 |
| Date code DDMMYYYY | 23062026 · no palindrome in next 200 years |
| Sun declination | +23.41° (Cooper approximation) |
| Distance from solstice | 3 days |