Calendarby GlyphOctober 2027 calendar
October 2027
Coming upJuly 2027
Coming upSeptember 2027
Bear season opens (MN)Permit areas & no-quota areaThe season runs through Oct 17, 2027 (Permit areas & no-quota area).Minnesota DNRDetails →National Hispanic Heritage MonthNational Hispanic Heritage Month, observed across the US.Library of Congress and partners, computedDetails →Deer Archery season opens (MN)StatewideThe season runs through Dec 31, 2027, statewide.Minnesota DNRDetails →Rabbit, Cottontail & Snowshoe Hare season opens (MN)StatewideThe season runs through Feb 29, 2028, statewide.Minnesota DNRDetails →Rabbit, Jack season opens (MN)StatewideThe season runs through Feb 29, 2028, statewide.Minnesota DNRDetails →Squirrel, Gray & Fox season opens (MN)StatewideThe season runs through Feb 29, 2028, statewide.Minnesota DNRDetails →BASTA! Fall 2027Mainz, Germany · IndependentA five-day tech conference in Mainz, Germany.IndependentDetails →Sharad NavaratriNine nights of the goddess Durga; Durga Puja in Bengal. Ashvin, Shukla 1. Regional dates can differ by a day.Wikipedia, computedDetails →Nine Emperor Gods FestivalNine days of Taoist rites and vegetarian fasting in Malaysia, Singapore and Thailand (the Phuket Vegetarian Festival). Day 1 of lunar month 9.Hong Kong Observatory, computedDetails →
Coming upOctober 2027
2027 Rugby World CupAustraliaThe rugby union World Cup.WikipediaDetails →Oracle AI World 2027Las Vegas, NV · OracleOracle's flagship customer conference showcasing AI-driven innovations across cloud infrastructure, data platforms, and applications.OracleDetails →Defender of Ukraine Day (Ukraine)UkraineA public holiday in Ukraine.Nager.DateDetails →National Day (Hong Kong)Hong KongA public holiday in Hong Kong.Nager.DateDetails →International Coffee DayA United Nations international day.United NationsDetails →International Day of Older PersonsA United Nations international day.United NationsDetails →AWS Generative AI Accelerator 2027 batch startsAWS Generative AI AcceleratorAWS Generative AI Accelerator 2027 begins. Estimated for October 2027, not announced yet.AWS Generative AI AcceleratorDetails →Creative Destruction Lab 2027/28 batch startsCreative Destruction LabCreative Destruction Lab 2027/28 begins. Estimated for October 2027, not announced yet.Creative Destruction LabDetails →Google for Startups Accelerator: Middle East, North Africa and Turkey 2027 batch startsMENA and Turkey · Google for Startups AcceleratorGoogle for Startups Accelerator: Middle East, North Africa and Turkey 2027 begins. Estimated for October 2027, not announced yet.Google for Startups AcceleratorDetails →Microsoft retires Automanage for Virtual MachinesMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires gpt-4o (2024-08-06)MicrosoftAzure OpenAI in Foundry ends support for this model.MicrosoftDetails →Microsoft retires gpt-4o-mini (2024-07-18)MicrosoftAzure OpenAI in Foundry ends support for this model.MicrosoftDetails →Tampa AI Week 2027Tampa, FL · Enterprise Technology AssociationThis is Florida's first AI Congress, bringing together executives, technologists, and innovators to explore practical AI strategies and real-world use cases.Enterprise Technology AssociationDetails →TechCon SiliconValley 2027San Francisco, SF Bay Area, CA · TechCon GlobalA multi-day conference for founders, investors, and industry leaders focused on technology, innovation, and business growth.TechCon GlobalDetails →Rosh HashanahThe Jewish New Year. Begins at sundown on Fri, October 1, 2027.Hebcal, computedDetails →Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Fri, October 1, 2027.Hebcal, computedDetails →Richard III of England, born 1452 (575 years)Richard III of England (died 1485).WikipediaDetails →William Ramsay, born 1852 (175 years)Scottish chemist and academic, Nobel Prize laureate (died 1916).WikipediaDetails →International Day of Non-ViolenceA United Nations international day.United NationsDetails →SAT test date (anticipated)US test centersAnticipated SAT Weekend test date for 2027-28; College Board confirms later.College BoardDetails →2027 Turkish Grand PrixIstanbul Park, IstanbulFormula One returns to Istanbul Park.WikipediaDetails →425th anniversary: Anglo-Spanish War: An English fleet intercepted and attacked six Spanish ships...In 1602, Anglo-Spanish War: An English fleet intercepted and attacked six Spanish ships at the Battle of the Narrow Seas (pictured).WikipediaDetails →German Unity Day (Germany)GermanyA public holiday in Germany, known locally as Tag der Deutschen Einheit.Nager.DateDetails →World Communion SundayThe first Sunday of October, an ecumenical Protestant observance begun by Presbyterians in 1933.Revised Common Lectionary (Vanderbilt), computedDetails →75th anniversary: The United Kingdom successfully conducted its first nuclear test, becoming the...In 1952, The United Kingdom successfully conducted its first nuclear test, becoming the world's third state with nuclear weapons.WikipediaDetails →2027 ICC Men's Cricket World CupSouth Africa, Zimbabwe and NamibiaThe one-day international World Cup; the final is at the Wanderers, Johannesburg.WikipediaDetails →US Supreme Court term opens (October Term 2027)The Court’s annual term begins on the first Monday in October.Supreme Court of the United States, computedDetails →100th anniversary: Gutzon Borglum and approximately 400 workers began sculpting Mount RushmoreIn 1927, Gutzon Borglum and approximately 400 workers began sculpting Mount Rushmore.WikipediaDetails →National Foundation Day (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →St. Francis of Assisi's Day (Italy)ItalyA public holiday in Italy, known locally as San Francesco d'Assisi.Nager.DateDetails →Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Hebcal, computedDetails →Saint Francis of AssisiMemorial of Saint Francis; many churches bless animals on or near this day.USCCB liturgical year, computedDetails →Splunk .conf27Chicago, IL · CiscoSplunk's annual conference on security, observability and data.CiscoDetails →Republic Day (Portugal)PortugalA public holiday in Portugal, known locally as Implantação da República.Nager.DateDetails →Imran Khan, born 1952 (75 years)Pakistani cricketer and politician, 22nd Prime Minister of Pakistan.WikipediaDetails →World Teachers’ DayA United Nations international day.United NationsDetails →
HubSpot earnings (Q3 FY2027)HubSpot (HUBS)HubSpot reports Q3 FY2027 results before the market opens.EarningsDetails →Durga PujaBengal’s great festival of the goddess Durga, from Maha Saptami to Vijaya Dashami (the goddess is welcomed on Shashthi, the day before). Ashvin, Shukla 7....Wikipedia, computedDetails →100th anniversary: The Jazz Singer, one of the first feature-length motion pictures with a...In 1927, The Jazz Singer, one of the first feature-length motion pictures with a synchronized recorded music score, was released.WikipediaDetails →250th anniversary: American Revolutionary War: Fort Clinton and Fort Montgomery were captured by...In 1777, American Revolutionary War: Fort Clinton and Fort Montgomery were captured by British forces under Sir Henry Clinton, dismantling the Hudson River Chains.WikipediaDetails →Armed Forces Day (Egypt)EgyptA public holiday in Egypt.Nager.DateDetails →25th anniversary: Al-Qaeda bombed the oil tanker Limburg, causing oil to leak into the Gulf of AdenIn 2002, Al-Qaeda bombed the oil tanker Limburg, causing oil to leak into the Gulf of Aden.WikipediaDetails →World Habitat DayA United Nations international day.United NationsDetails →PyTorch Conference North America 2027San Jose, SF Bay Area, CA · Linux FoundationCommunity conference on PyTorch and open source AI.Linux FoundationDetails →Vladimir Putin, born 1952 (75 years)Russian colonel and politician, 4th President of Russia.WikipediaDetails →First quarter moonThe Moon is half lit (waxing).NASA, computedDetails →María Corina Machado, born 1967 (60 years)Venezuelan Nobel Prize Laureate.WikipediaDetails →World Cotton DayA United Nations international day.United NationsDetails →Anthropic retires claude-haiku-5-5AnthropicClaude API ends support for this model.AnthropicDetails →Battle of Angamos (Peru)PeruA public holiday in Peru, known locally as Combate de Angamos.Nager.DateDetails →Chung Yeung Festival (Hong Kong)Hong KongA public holiday in Hong Kong.Nager.DateDetails →75th anniversary: Three trains collided (aftermath pictured) at Harrow & Wealdstone station in LondonIn 1952, Three trains collided (aftermath pictured) at Harrow & Wealdstone station in London, killing 112 people and injuring 340 others.WikipediaDetails →Double Ninth FestivalChongyang: climbing heights, honoring elders. Day 9 of lunar month 9.Hong Kong Observatory, computedDetails →Dussehra (Vijayadashami)The victory of Rama over Ravana and of Durga over Mahishasura. Ashvin, Shukla 10. Regional dates can differ by a day.Wikipedia, computedDetails →Independence Day (Uganda)UgandaA public holiday in Uganda.Nager.DateDetails →Draconids meteor shower peakUp to about 10 meteors an hour under a dark sky at the peak (IMO zenithal hourly rate); best after midnight.International Meteor Organization, computedDetails →2027 Louisiana gubernatorial electionLouisianaLouisiana elects its governor; a runoff follows if no candidate wins a majority.WikipediaDetails →75th anniversary: A footman shot and killed two colleagues and wounded the lady of the house at...In 1952, A footman shot and killed two colleagues and wounded the lady of the house at Knowsley Hall, England.WikipediaDetails →Emil Fischer, born 1852 (175 years)German chemist and academic, Nobel Prize laureate (died 1919).WikipediaDetails →World Post DayA United Nations international day.United NationsDetails →Microsoft retires Azure Key Vault Secrets Provider Extension for Azure Arc enabled Kubernetes clustersMicrosoftAzure ends support for this service.MicrosoftDetails →2027 Singapore Grand PrixMarina Bay Street Circuit, SingaporeFormula One Singapore Grand Prix race day.WikipediaDetails →World Mental Health DayA United Nations international day.United NationsDetails →Indigenous Peoples' DayMinnesotaA public holiday in Minnesota.Nager.DateDetails →Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Sun, October 10, 2027.Hebcal, computedDetails →Columbus Day (Puerto Rico)Puerto RicoA public holiday in Puerto Rico, known locally as Día de la Raza / Descubrimiento de América.Nager.DateDetails →Day of Respect for Cultural Diversity (Argentina)ArgentinaA public holiday in Argentina, known locally as Día del Respeto a la Diversidad Cultural.Nager.DateDetails →Hangul Day (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →Mazingira Day (Kenya)KenyaA public holiday in Kenya.Nager.DateDetails →Sports Day (Japan)JapanA public holiday in Japan.Nager.DateDetails →Thanksgiving (Canada)CanadaA public holiday in Canada.Nager.DateDetails →175th anniversary: The University of Sydney (pictured), Australia's oldest university, was...In 1852, The University of Sydney (pictured), Australia's oldest university, was inaugurated two years after being established by the University of Sydney Act.WikipediaDetails →25th anniversary: A bomb exploded in the Myyrmanni shopping center in Helsinki, Finland...In 2002, A bomb exploded in the Myyrmanni shopping center in Helsinki, Finland (aftermath pictured), resulting in seven deaths and 159 injuries.WikipediaDetails →Bobby Charlton, born 1937 (90 years)English footballer and manager (died 2023).WikipediaDetails →International Day of the Girl ChildA United Nations international day.United NationsDetails →Windows 10 consumer Extended Security Updates endThe consumer Extended Security Updates program for Windows 10 version 22H2 ends; SQL Server 2017 also reaches end of support.WikipediaDetails →National Day of Spain (Spain)SpainA public holiday in Spain, known locally as Fiesta Nacional de España.Nager.DateDetails →Our Lady of Aparecida (Brazil)BrazilA public holiday in Brazil, known locally as Nossa Senhora Aparecida.Nager.DateDetails →Gahambar Ayathrem (herding home)The fourth Gahambar, in the Fasli calendar.avesta.org Zoroastrian calendars, computedDetails →Microsoft retires Microsoft SQL Server 14.0MicrosoftMicrosoft SQL Server ends support for this runtime.MicrosoftDetails →Microsoft retires SQL Server 2017MicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires Windows 11 Enterprise and Education, Version 24H2MicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires Windows 11 IoT Enterprise, Version 24H2MicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Turgut Özal, born 1927 (100 years)Turkish engineer and politician, 8th President of Turkey (died 1993).WikipediaDetails →International Day for Disaster Risk ReductionA United Nations international day.United NationsDetails →
ASML earnings (Q3 FY2027)ASML (ASML)ASML reports Q3 FY2027 results before the market opens.EarningsDetails →Google Cloud retires Cloud SQL for SQL Server: SQL Server 2017Google CloudGoogle Cloud ends support for this service.Google CloudDetails →
| Date | Event | |||
|---|---|---|---|---|
| Coming upJuly 2027 | ||||
| Jul 19Monin 8 months | Vassa (Buddhist Rains Retreat)The three-month rains retreat of Theravada monks, from Khao Phansa, the day after Asalha Puja, to Ok Phansa.Religion · Buddhism · to Oct 15 · Bank of Thailand holiday calendar | – | annual | Bank of Thailand holiday calendar |
| Coming upSeptember 2027 | ||||
| Sep 1Wedin 9 months | Bear season opens (MN)The season runs through Oct 17, 2027 (Permit areas & no-quota area).Outdoors · Hunting · to Oct 17 · Permit areas & no-quota area · Minnesota DNR | Permit areas & no-quota area | annual | Minnesota DNR |
| Sep 15Wedin 10 months | National Hispanic Heritage MonthNational Hispanic Heritage Month, observed across the US.Observances · Heritage months · to Oct 15 · Library of Congress and partners | – | annual | Library of Congress and partnersComputed (rule) |
| Sep 18Satin 10 months | Deer Archery season opens (MN)The season runs through Dec 31, 2027, statewide.Outdoors · Hunting · to Dec 31 · Statewide · Minnesota DNR | Statewide | annual | Minnesota DNR |
| Rabbit, Cottontail & Snowshoe Hare season opens (MN)The season runs through Feb 29, 2028, statewide.Outdoors · Hunting · to Feb 29 · Statewide · Minnesota DNR | Statewide | annual | Minnesota DNR | |
| Rabbit, Jack season opens (MN)The season runs through Feb 29, 2028, statewide.Outdoors · Hunting · to Feb 29 · Statewide · Minnesota DNR | Statewide | annual | Minnesota DNR | |
| Squirrel, Gray & Fox season opens (MN)The season runs through Feb 29, 2028, statewide.Outdoors · Hunting · to Feb 29 · Statewide · Minnesota DNR | Statewide | annual | Minnesota DNR | |
| Sep 27Monin 10 months | BASTA! Fall 2027A five-day tech conference in Mainz, Germany.Tech · Conferences · to Oct 1 · Mainz, Germany · Independent | Mainz, Germany; Independent | annual | Independent |
| Sep 30Thuin 10 months | Sharad NavaratriTentativeNine nights of the goddess Durga; Durga Puja in Bengal. Ashvin, Shukla 1. Regional dates can differ by a day.Religion · Hinduism · to Oct 8 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Nine Emperor Gods FestivalNine days of Taoist rites and vegetarian fasting in Malaysia, Singapore and Thailand (the Phuket Vegetarian Festival). Day 1 of lunar month 9.Religion · Taoism and Chinese folk religion · to Oct 8 · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) | |
| Coming upOctober 2027 | ||||
| Oct 1Friin 10 months | 2027 Rugby World CupThe rugby union World Cup.Sports · Rugby · to Nov 13 · Australia · Wikipedia | Australia | every few years | Wikipedia |
| Oracle AI World 2027UnverifiedTentativeOracle's flagship customer conference showcasing AI-driven innovations across cloud infrastructure, data platforms, and applications.Tech · Conferences · Las Vegas, NV · Oracle | Las Vegas, NV; Oracle | annual | Oracle | |
| Defender of Ukraine Day (Ukraine)A public holiday in Ukraine.Holidays · Ukraine · Ukraine · Nager.Date | Ukraine | annual | Nager.Date | |
| National Day (Hong Kong)A public holiday in Hong Kong.Holidays · Hong Kong · Hong Kong · Nager.Date | Hong Kong | annual | Nager.Date | |
| International Coffee DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| International Day of Older PersonsA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| AWS Generative AI Accelerator 2027 batch startsTentativeAWS Generative AI Accelerator 2027 begins. Estimated for October 2027, not announced yet.Tech · Accelerators · to Oct 31 · AWS Generative AI Accelerator · AWS Generative AI Accelerator | AWS Generative AI Accelerator | annual | AWS Generative AI Accelerator | |
| Creative Destruction Lab 2027/28 batch startsTentativeCreative Destruction Lab 2027/28 begins. Estimated for October 2027, not announced yet.Tech · Accelerators · to Oct 31 · Creative Destruction Lab · Creative Destruction Lab | Creative Destruction Lab | annual | Creative Destruction Lab | |
| Google for Startups Accelerator: Middle East, North Africa and Turkey 2027 batch startsTentativeGoogle for Startups Accelerator: Middle East, North Africa and Turkey 2027 begins. Estimated for October 2027, not announced yet.Tech · Accelerators · to Oct 31 · MENA and Turkey · Google for Startups Accelerator | MENA and Turkey; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Microsoft retires Automanage for Virtual MachinesUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires gpt-4o (2024-08-06)Azure OpenAI in Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires gpt-4o-mini (2024-07-18)Azure OpenAI in Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Tampa AI Week 2027UnverifiedTentativeThis is Florida's first AI Congress, bringing together executives, technologists, and innovators to explore practical AI strategies and real-world use cases.Tech · Conferences · Tampa, FL · Enterprise Technology Association | Tampa, FL; Enterprise Technology Association | annual | Enterprise Technology Association | |
| TechCon SiliconValley 2027TentativeA multi-day conference for founders, investors, and industry leaders focused on technology, innovation, and business growth.Tech · Conferences · San Francisco, SF Bay Area, CA · TechCon Global | San Francisco, SF Bay Area, CA; TechCon Global | annual | TechCon Global | |
| Oct 2Satin 10 months | Rosh HashanahThe Jewish New Year. Begins at sundown on Fri, October 1, 2027.Religion · Judaism · to Oct 3 · Hebcal | – | annual | HebcalComputed (rule) |
| Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Fri, October 1, 2027.Religion · Judaism · to Oct 11 · Hebcal | – | annual | HebcalComputed (rule) | |
| Richard III of England, born 1452 (575 years)Richard III of England (died 1485).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| William Ramsay, born 1852 (175 years)Scottish chemist and academic, Nobel Prize laureate (died 1916).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of Non-ViolenceA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| SAT test date (anticipated)Anticipated SAT Weekend test date for 2027-28; College Board confirms later.Academic · Exams · US test centers · College Board | US test centers | annual | College Board | |
| Oct 3Sunin 10 months | 2027 Turkish Grand PrixFormula One returns to Istanbul Park.Sports · Formula 1 · Istanbul Park, Istanbul · Wikipedia | Istanbul Park, Istanbul | annual | Wikipedia |
| 425th anniversary: Anglo-Spanish War: An English fleet intercepted and attacked six Spanish ships...In 1602, Anglo-Spanish War: An English fleet intercepted and attacked six Spanish ships at the Battle of the Narrow Seas (pictured).History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| German Unity Day (Germany)A public holiday in Germany, known locally as Tag der Deutschen Einheit.Holidays · Germany · Germany · Nager.Date | Germany | annual | Nager.Date | |
| World Communion SundayThe first Sunday of October, an ecumenical Protestant observance begun by Presbyterians in 1933.Religion · Protestant, Anglican and Lutheran · Revised Common Lectionary (Vanderbilt) | – | annual | Revised Common Lectionary (Vanderbilt)Computed (rule) | |
| 75th anniversary: The United Kingdom successfully conducted its first nuclear test, becoming the...In 1952, The United Kingdom successfully conducted its first nuclear test, becoming the world's third state with nuclear weapons.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Oct 4Monin 10 months | 2027 ICC Men's Cricket World CupThe one-day international World Cup; the final is at the Wanderers, Johannesburg.Sports · Cricket · to Nov 21 · South Africa, Zimbabwe and Namibia · Wikipedia | South Africa, Zimbabwe and Namibia | every few years | Wikipedia |
| US Supreme Court term opens (October Term 2027)The Court’s annual term begins on the first Monday in October.Politics · Government · Supreme Court of the United States | – | annual | Supreme Court of the United StatesComputed (rule) | |
| 100th anniversary: Gutzon Borglum and approximately 400 workers began sculpting Mount RushmoreIn 1927, Gutzon Borglum and approximately 400 workers began sculpting Mount Rushmore.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| National Foundation Day (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date | |
| St. Francis of Assisi's Day (Italy)A public holiday in Italy, known locally as San Francesco d'Assisi.Holidays · Italy · Italy · Nager.Date | Italy | annual | Nager.Date | |
| Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) | |
| Saint Francis of AssisiMemorial of Saint Francis; many churches bless animals on or near this day.Religion · Catholic · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| Splunk .conf27Splunk's annual conference on security, observability and data.Tech · Conferences · to Oct 7 · Chicago, IL · Cisco | Chicago, IL; Cisco | annual | Cisco | |
| Oct 5Tuein 11 months | Republic Day (Portugal)A public holiday in Portugal, known locally as Implantação da República.Holidays · Portugal · Portugal · Nager.Date | Portugal | annual | Nager.Date |
| Imran Khan, born 1952 (75 years)Pakistani cricketer and politician, 22nd Prime Minister of Pakistan.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Teachers’ DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| HubSpot earnings (Q3 FY2027)TentativeHubSpot reports Q3 FY2027 results before the market opens.Economy · Earnings · HubSpot (HUBS) · Earnings | HubSpot (HUBS) | quarterly | Earnings | |
| Oct 6Wedin 11 months | Durga PujaTentativeBengal’s great festival of the goddess Durga, from Maha Saptami to Vijaya Dashami (the goddess is welcomed on Shashthi, the day before). Ashvin, Shukla 7....Religion · Hinduism · to Oct 9 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 100th anniversary: The Jazz Singer, one of the first feature-length motion pictures with a...In 1927, The Jazz Singer, one of the first feature-length motion pictures with a synchronized recorded music score, was released.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 250th anniversary: American Revolutionary War: Fort Clinton and Fort Montgomery were captured by...In 1777, American Revolutionary War: Fort Clinton and Fort Montgomery were captured by British forces under Sir Henry Clinton, dismantling the Hudson River Chains.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Armed Forces Day (Egypt)A public holiday in Egypt.Holidays · Egypt · Egypt · Nager.Date | Egypt | annual | Nager.Date | |
| 25th anniversary: Al-Qaeda bombed the oil tanker Limburg, causing oil to leak into the Gulf of AdenIn 2002, Al-Qaeda bombed the oil tanker Limburg, causing oil to leak into the Gulf of Aden.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Habitat DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| PyTorch Conference North America 2027Community conference on PyTorch and open source AI.Tech · Conferences · to Oct 7 · San Jose, SF Bay Area, CA · Linux Foundation | San Jose, SF Bay Area, CA; Linux Foundation | annual | Linux Foundation | |
| Oct 7Thuin 11 months | Vladimir Putin, born 1952 (75 years)Russian colonel and politician, 4th President of Russia.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| First quarter moonThe Moon is half lit (waxing).Sky · Moon phases · 6:48 am CT · NASA | – | monthly | NASAComputed (rule) | |
| María Corina Machado, born 1967 (60 years)Venezuelan Nobel Prize Laureate.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Cotton DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Anthropic retires claude-haiku-5-5UnverifiedTentativeClaude API ends support for this model.Tech · Retirements · Anthropic · Anthropic | Anthropic | one-off | Anthropic | |
| Oct 8Friin 11 months | Battle of Angamos (Peru)A public holiday in Peru, known locally as Combate de Angamos.Holidays · Peru · Peru · Nager.Date | Peru | annual | Nager.Date |
| Chung Yeung Festival (Hong Kong)A public holiday in Hong Kong.Holidays · Hong Kong · Hong Kong · Nager.Date | Hong Kong | annual | Nager.Date | |
| 75th anniversary: Three trains collided (aftermath pictured) at Harrow & Wealdstone station in LondonIn 1952, Three trains collided (aftermath pictured) at Harrow & Wealdstone station in London, killing 112 people and injuring 340 others.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Double Ninth FestivalChongyang: climbing heights, honoring elders. Day 9 of lunar month 9.Culture · Lunar calendar festivals · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) | |
| Oct 9Satin 11 months | Dussehra (Vijayadashami)TentativeThe victory of Rama over Ravana and of Durga over Mahishasura. Ashvin, Shukla 10. Regional dates can differ by a day.Religion · Hinduism · Wikipedia | – | annual | WikipediaComputed (rule) |
| Independence Day (Uganda)A public holiday in Uganda.Holidays · Uganda · Uganda · Nager.Date | Uganda | annual | Nager.Date | |
| Draconids meteor shower peakUp to about 10 meteors an hour under a dark sky at the peak (IMO zenithal hourly rate); best after midnight.Sky · Meteor showers · International Meteor Organization | – | annual | International Meteor OrganizationComputed (rule) | |
| 2027 Louisiana gubernatorial electionLouisiana elects its governor; a runoff follows if no candidate wins a majority.Politics · US and Minnesota elections · Louisiana · Wikipedia | Louisiana | every few years | Wikipedia | |
| 75th anniversary: A footman shot and killed two colleagues and wounded the lady of the house at...In 1952, A footman shot and killed two colleagues and wounded the lady of the house at Knowsley Hall, England.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Emil Fischer, born 1852 (175 years)German chemist and academic, Nobel Prize laureate (died 1919).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Post DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Microsoft retires Azure Key Vault Secrets Provider Extension for Azure Arc enabled Kubernetes clustersUnverifiedAzure ends support for this service.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Oct 10Sunin 11 months | 2027 Singapore Grand PrixFormula One Singapore Grand Prix race day.Sports · Formula 1 · Marina Bay Street Circuit, Singapore · Wikipedia | Marina Bay Street Circuit, Singapore | annual | Wikipedia |
| World Mental Health DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Oct 11Monin 11 months | Indigenous Peoples' DayA public holiday in Minnesota.Holidays · United States · Minnesota · Nager.Date | Minnesota | annual | Nager.Date |
| Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Sun, October 10, 2027.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) | |
| Columbus Day (Puerto Rico)A public holiday in Puerto Rico, known locally as Día de la Raza / Descubrimiento de América.Holidays · Puerto Rico · Puerto Rico · Nager.Date | Puerto Rico | annual | Nager.Date | |
| Day of Respect for Cultural Diversity (Argentina)A public holiday in Argentina, known locally as Día del Respeto a la Diversidad Cultural.Holidays · Argentina · Argentina · Nager.Date | Argentina | annual | Nager.Date | |
| Hangul Day (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date | |
| Mazingira Day (Kenya)A public holiday in Kenya.Holidays · Kenya · Kenya · Nager.Date | Kenya | annual | Nager.Date | |
| Sports Day (Japan)A public holiday in Japan.Holidays · Japan · Japan · Nager.Date | Japan | annual | Nager.Date | |
| Thanksgiving (Canada)A public holiday in Canada.Holidays · Canada · Canada · Nager.Date | Canada | annual | Nager.Date | |
| 175th anniversary: The University of Sydney (pictured), Australia's oldest university, was...In 1852, The University of Sydney (pictured), Australia's oldest university, was inaugurated two years after being established by the University of Sydney Act.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 25th anniversary: A bomb exploded in the Myyrmanni shopping center in Helsinki, Finland...In 2002, A bomb exploded in the Myyrmanni shopping center in Helsinki, Finland (aftermath pictured), resulting in seven deaths and 159 injuries.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Bobby Charlton, born 1937 (90 years)English footballer and manager (died 2023).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of the Girl ChildA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Oct 12Tuein 11 months | Windows 10 consumer Extended Security Updates endThe consumer Extended Security Updates program for Windows 10 version 22H2 ends; SQL Server 2017 also reaches end of support.Tech · Launches · Wikipedia | – | annual | Wikipedia |
| National Day of Spain (Spain)A public holiday in Spain, known locally as Fiesta Nacional de España.Holidays · Spain · Spain · Nager.Date | Spain | annual | Nager.Date | |
| Our Lady of Aparecida (Brazil)A public holiday in Brazil, known locally as Nossa Senhora Aparecida.Holidays · Brazil · Brazil · Nager.Date | Brazil | annual | Nager.Date | |
| Gahambar Ayathrem (herding home)The fourth Gahambar, in the Fasli calendar.Religion · Zoroastrianism · to Oct 16 · avesta.org Zoroastrian calendars | – | annual | avesta.org Zoroastrian calendarsComputed (rule) | |
| Microsoft retires Microsoft SQL Server 14.0UnverifiedMicrosoft SQL Server ends support for this runtime.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires SQL Server 2017UnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires Windows 11 Enterprise and Education, Version 24H2UnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires Windows 11 IoT Enterprise, Version 24H2UnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Oct 13Wedin 11 months | Turgut Özal, born 1927 (100 years)Turkish engineer and politician, 8th President of Turkey (died 1993).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| International Day for Disaster Risk ReductionA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| ASML earnings (Q3 FY2027)TentativeASML reports Q3 FY2027 results before the market opens.Economy · Earnings · ASML (ASML) · Earnings | ASML (ASML) | quarterly | Earnings | |
| Google Cloud retires Cloud SQL for SQL Server: SQL Server 2017UnverifiedGoogle Cloud ends support for this service.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |