In Great Britain Midsummer was celebrated on Midsummer Eve (St. John's Eve, June 23) and St. Peter's Eve (June 28).http://en.wikipedia.org/wiki/Midsummer#United_KingdomGolowan is the Cornish language word for the Midsummer celebrations in Cornwall, UKhttp://en.wikipedia.org/wiki/Golowan_FestivalThe evening of 23 June, St John's Evehttp://en.wikipedia.org/wiki/St_John%27s_Eve
A poisonous cloud from Laki volcano reached Great Britain on 23 June, 1783http://en.wikipedia.org/wiki/Laki#Consequences_in_EuropeThe 1946 Vancouver Island earthquake struck Vancouver Island, on Sunday, June 23, 1946.http://en.wikipedia.org/wiki/1946_Vancouver_Island_earthquakeThe Battle of Bannockburn was fought on 23 and 24 June, 1314.http://astronomy.activeboard.com/t43532801/the-battle-of-bannockburn-1314/The Battle of Plassey was a decisive victory of the British East India Company on 23 June 1757. http://en.wikipedia.org/wiki/Battle_of_PlasseyThe Antarctic Treaty was signed in December 1, 1959 and came in force on the 23rd June 1961http://en.wikipedia.org/wiki/Antarctic_TreatyThe lowest temperature ever recorded at the Amundsen-Scott South Pole Station was -82.8°C on June 23, 1982http://en.wikipedia.org/wiki/South_Pole#Climate_and_day_and_night
On June 23, 1905 the Wright Brothers first flew their third powered aircraft, the Flyer III.http://en.wikipedia.org/wiki/Wright_Flyer_III
NOAA-7, designated NOAA-C before launch, was an American weather satellite launched in June 1981http://en.wikipedia.org/wiki/NOAA-7The Lunar Reconnaissance Orbiter Lunar Orbit Insertion in 2009http://lro.gsfc.nasa.gov/
Donn F. Eisele (June 23, 1930 - December 2, 1987) was an USAF test pilot and later a NASA astronaut. http://en.wikipedia.org/wiki/Donn_Fulton_EiseleNikolai Dmitriyevich Kuznetsov was a Chief Designer of the Soviet Design Bureau OKB-276 http://en.wikipedia.org/wiki/Nikolai_Dmitriyevich_KuznetsovAlan Mathison Turing (23 June 1912 - 7 June 1954), was a British mathematicianhttp://en.wikipedia.org/wiki/Alan_TuringAndré Tacquet (23 June 1612 Antwerp - 22 December 1660) was a Flemish mathematicianhttp://en.wikipedia.org/wiki/Andr%C3%A9_TacquetProfessor Sir Nicholas John Shackleton (23 June 1937 - 24 January 2006) was an English geologisthttp://en.wikipedia.org/wiki/Nicholas_ShackletonDr Helen Geake is one of the key members of the long-running archaeology series Time Teamhttp://en.wikipedia.org/wiki/Helen_GeakeMaggie Philbin (born 23 June 1955) is an English radio and television presenter http://en.wikipedia.org/wiki/Maggie_Philbin
Jaume Nomen Torres (born June 23, 1960) is a prolific discoverer of asteroidshttps://en.wikipedia.org/wiki/Jaume_Nomen
Logan's Run is a 1976 science fiction film based on the novel of the same namehttp://astronomy.activeboard.com/t49721613/logans-run/
NGC 6718 was discovered by British astronomer John Herschel on the 23rd June 1835. http://astronomy.activeboard.com/t57896128/ngc-6718/NGC 6719 was discovered by British astronomer John Herschel on the 23rd June 1835. http://astronomy.activeboard.com/t57896120/ngc-6719/NGC 6784 was discovered by British astronomer John Herschel on the 23rd June 1835. http://astronomy.activeboard.com/t57896114/ngc-6784/
A photographic plate was taken showing bright lines of hydrogen of AT Microscopii in June 23, 1895http://en.wikipedia.org/wiki/AT_Microscopii#Observational_history
On June 23, 1998, an extrasolar planet was announced in orbit around Gliese 876http://en.wikipedia.org/wiki/Gliese_876#Planetary_systemOn 23 June 2010, astronomers announced they measured a superstorm in the atmosphere of HD 209458 bhttp://en.wikipedia.org/wiki/HD_209458_b#Spectral_observationA Pluto occultation occurred on June 23, 2011http://astronomy.activeboard.com/t43486239/pluto-occultation-june-2011/
MeteoritesThe Chervony Kut (stone; eucrite achondrite) meteorite fell in Sumy, Ukraine, on the 23rd June 1939.http://astronomy.activeboard.com/t43532560/chervony-kut-meteorite/The Fort Flatters (stone) meteorite fell in Illizi, Algeria, on the 23rd June, 1944.http://astronomy.activeboard.com/t43532587/fort-flatters-meteorite/Meteorites fell on the village of Kakat, Kendrapara district, India, on Thursday, 23 June 2005.http://astronomy.activeboard.com/t54154202/kakat-meteorites/The Whetstone Mountains (H5) meteorite fell on Arizona, USA, on the 23rd June 2009.http://astronomy.activeboard.com/t40663240/whetstone-mountains-meteorite/