Events

O'Hare station train crash (March 24, 2014) O'Hare station train crash A CTA Blue Line train overran the bumper at O'Hare station on March 24, 2014. Thirty-four people were injured; the operator fell asleep. The incident prompted safety reviews and lo…

Occupy Wall Street (2011 protest movement) Occupy Wall Street A 2011 protest movement that began in New York City to criticize economic inequality, corporate influence, and political power; it inspired occupations and demonstrations across th…

October 1: calendar day, observances, and significance October 1 October 1 is an early-October date in the Gregorian calendar, marking the 274th day of common years (275th in leap years). It is associated with national days, seasonal markers, an…

October 11 — calendar date, observances and notable facts October 11 Overview of October 11 in the Gregorian calendar, its position in the year, common observances (including International Day of the Girl Child and National Coming Out Day), and nota…

October 14 Overview of October 14: its place in the Gregorian calendar, seasonal and astronomical notes, notable historical events and observances, and a brief list of well-known births and a…

October 16 October 16 is the 289th day of the year (290th in leap years). It is known for World Food Day and a mix of historical events, religious feasts, and notable births and observances.

October 18 October 18 is the 291st day of the year (292nd in leap years). It marks observances such as Alaska Day and Persons Day and is the feast day of Saint Luke in many Christian calendar…

October 19 October 19 is the 292nd day of the year (293rd in leap years). It has been the date of several notable historical events, observances and cultural references across the northern au…

October 2015 Speaker of the United States House of Representatives election Special House election held October 29, 2015, after Speaker John Boehner announced his resignation; Paul Ryan was elected Speaker during the 114th Congress and assumed House leader…

October 2018 United States mail bombing attempts A series of improvised explosive devices sent by mail in late October 2018 targeted prominent U.S. Democratic politicians, media figures and donors. The FBI treated the case as dom…

October 21 October 21 is the 294th day of the year (295th in leap years). Overview of its calendar position, seasonal context, notable events, and common observances.

October 26 October 26 is late in the calendar year (299th day, 300th in leap years). It falls during autumn in the Northern Hemisphere and is associated with a variety of local observances an…

October 29 October 29 is the 302nd day of the year (303rd in leap years) in the Gregorian calendar. It is known for events such as the 1929 Wall Street crash and the founding of the Republic…

October 3 (calendar date) October 3 October 3 is the 276th day of the year (277th in leap years). Notable for national observances such as German Unity Day, it sits early in October and marks seasonal changes in each…

October 30: Calendar Position, Observances, and Notable Events October 30 Overview of October 30: its placement in common and leap years, days remaining in the year, and a concise catalog of national and religious observances, anniversaries, and notable…

October 5 Calendar date: the 278th day (279th in leap years) of the Gregorian year. Notable as the United Nations' World Teachers' Day and for seasonal, cultural, and historical observances…

October 6 October 6 is the 279th day of the year (280th in leap years) in the Gregorian calendar. It is associated with seasonal markers in each hemisphere and several notable historical eve…

October 7 October 7 is a date in the Gregorian calendar (the 280th day in common years, 281st in leap years) with several historical events, observances and notable birthdays.

October 8 Overview of October 8: its place in the calendar, seasonal context, notable events and births, typical observances, and historical significance.

OFC Nations Cup: Oceania's international football championship OFC Nations Cup The OFC Nations Cup is the principal international football competition for Oceania, organised by the Oceania Football Confederation and contested by its member national teams.

Oklahoma City bombing (April 19, 1995) Oklahoma City bombing A domestic terrorist truck bombing of the Alfred P. Murrah Federal Building in Oklahoma City that killed 168 people and injured hundreds; perpetrators included Timothy McVeigh and…

Oklahoma Land Run (Land Rush of 1889) Oklahoma Land Run The Land Rush of 1889 opened the Unassigned Lands of central Oklahoma to non‑Native settlement on April 22, 1889. Thousands raced to claim plots, founding towns and reshaping the r…

Oktoberfest (Wiesn): Munich's annual beer and folk festival Oktoberfest Oktoberfest is Munich's large annual beer and folk festival on the Theresienwiese. Held in late September–early October, it features beer tents, traditional food, music, rides and…

Olympic Flame and Torch Relay Olympic Flame The Olympic Flame is a ceremonial symbol of the Olympic Games, lit in Olympia and carried by a relay to the host city; it represents continuity with ancient Greece and often attrac…

Omagh bombing A 1998 car-bomb attack in Omagh, County Tyrone, Northern Ireland, claimed by the Real Irish Republican Army; it killed 29 people, injured hundreds, and prompted legal action, memor…

One Billion Rising One Billion Rising is a global civil-society campaign launched by Eve Ensler in 2012 to demand an end to rape and sexual violence and to promote justice, safety and gender equality…

One World Film Festival Annual Prague festival of human-rights documentary cinema organized by People in Need, featuring screenings, debates, exhibitions and a changing thematic focus each year.

One-Two-Go Airlines Flight 269 — 2007 Phuket crash One-Two-GO Airlines Flight 269 A summary of the September 16, 2007 One-Two-GO Airlines Flight 269 accident at Phuket Airport, its sequence, investigation findings, and safety implications.

Openair Frauenfeld: Switzerland's Largest Hip Hop Festival Openair Frauenfeld Major annual hip hop festival in Frauenfeld, Switzerland. Multi-day event showcasing international rap and hip hop artists since 1985; known for large crowds, camping, and its infl…

Operación Puerto: the 2006 Spanish doping investigation Operación Puerto doping case Operación Puerto was a major 2006 Spanish police investigation into alleged sports doping centered on Dr. Eufemiano Fuentes and numerous professional athletes, with long legal and…

Operation Car Wash (Operação Lava Jato) — Brazilian corruption investigation Operation Car Wash Large-scale Brazilian probe into money laundering, bribery and contract fraud tied to Petrobras and construction firms; produced major prosecutions, international inquiries and leg…

Operation Eagle Claw (Operation Tabas) — 1980 U.S. hostage rescue attempt Operation Eagle Claw A 1980 U.S. military attempt to free American diplomats held in Tehran. The mission failed after mechanical problems and a collision; it influenced U.S. special operations reform a…

Operation Entebbe (Operation Jonathan): 1976 Israeli hostage rescue at Entebbe Airport Operation Entebbe Operation Entebbe was a July 1976 Israeli commando raid to free hostages held at Entebbe Airport, Uganda, after an Air France hijacking. The raid freed most hostages but cost Lt. C…

Operation Meetinghouse — Tokyo firebombing (9–10 March 1945) Operation Meetinghouse A major nighttime incendiary air raid by the United States on Tokyo during World War II that created a devastating firestorm, killed about 100,000 people and left roughly one milli…

Operation Restore Hope: US-led 1992–93 multinational mission for humanitarian relief in Somalia Operation Restore Hope Operation Restore Hope (1992–93): a US-led, UN-authorized multinational mission to secure supply routes, protect relief deliveries and aid civilians amid Somalia’s famine and civil…

Operation Uphold Democracy (1994–1995) Operation Uphold Democracy A United States–led multinational intervention in Haiti (Sept 1994–Mar 1995) that restored President Jean‑Bertrand Aristide after the 1991 military coup and established a transitio…

Operation Yewtree: Metropolitan Police inquiry into historic sexual offences Operation Yewtree Operation Yewtree was a high‑profile Metropolitan Police investigation begun in 2012 into historic sexual offences and child sexual abuse allegations against public figures after r…

2016 Orlando nightclub shooting (Pulse attack) Orlando nightclub shooting Mass shooting at the Pulse gay nightclub in Orlando, Florida on June 12, 2016. Dozens were killed or wounded; the gunman, Omar Mateen, was killed by police. The assault prompted na…

Over the Limit (2010) — inaugural WWE pay-per-view in Detroit Over the Limit (2010) Overview of Over the Limit (2010), the first WWE Over the Limit pay-per-view, held May 23, 2010 at Joe Louis Arena in Detroit; background, format, venue and its place in WWE chrono…

Over the Limit (2011) — WWE pay-per-view event Over the Limit (2011) Over the Limit (2011) was a WWE pay-per-view held May 22, 2011 at KeyArena in Seattle. It was the second event in the Over the Limit series and featured top championship matches fr…

Overland Relief Expedition (Point Barrow rescue, 1897–1898) Overland Expedition A U.S. government-led winter trek that used reindeer and sled teams to rescue more than 250 Arctic whalers trapped by pack ice near Point Barrow, Alaska, in 1897–1898.

Oxegen — Irish multi‑day music festival at Punchestown (2004–2013) Oxegen Oxegen was an annual multi‑day music festival held at Punchestown Racecourse, County Kildare, Ireland (2004–2013), known for large camping capacity, international headliners and a…

Pact of Steel (1939) — Alliance between Fascist Italy and Nazi Germany Pact of Steel The Pact of Steel was a 1939 political and military alliance between Fascist Italy and Nazi Germany, consisting of a public treaty and a secret supplementary protocol that coordina…

Pakistan International Airlines Flight 8303 Overview of the 22 May 2020 crash of PIA Flight 8303 into Karachi: route, aircraft, casualties, investigation, aftermath and key facts about the accident.

2017 Palm Sunday church bombings in Egypt Palm Sunday church bombings Twin suicide bombings on 9 April 2017 attacked two Coptic churches in Tanta and Alexandria, killing dozens and wounding many; the Islamic State's Sinai Province claimed responsibil…

Pan Am Flight 103 (Lockerbie bombing) Pan Am Flight 103 The December 21, 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland, destroyed a Boeing 747, killing 270; it produced a major international investigation, trial and long po…

Pan Am Flight 759 1982 air disaster: a Pan Am Boeing 727 encountered a microburst after takeoff from New Orleans and crashed into Kenner, killing all on board and several residents; prompted wind‑sh…

Pandemic: global spread of infectious disease Pandemic A pandemic is a widespread outbreak of infectious disease across regions or worldwide; this article explains causes, criteria, history, public-health responses, and how pandemics d…