Calendarby GlyphSeptember 2027 calendar
September 2027
Coming upMay 2027
Coming upJuly 2027
Coming upAugust 2027
Minnesota State Fair 2027State Fairgrounds, Falcon HeightsThe Great Minnesota Get-Together: twelve days ending on Labor Day.Minnesota State Fair, computedDetails →2027 FIBA Basketball World CupQatarMen's basketball world championship.WikipediaDetails →Paryushana (Svetambara)Eight days of fasting and reflection, the holiest time of the Jain year, ending on Samvatsari, the day of forgiveness (Michhami Dukkadam). Bhadrapada,...Wikipedia, computedDetails →
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 →Meta Connect 2027Menlo Park, SF Bay Area, CA · MetaMeta's annual developer event for AI, mixed reality, and smart glasses, showcasing Llama models and the next computing platform.MetaDetails →Orthodox Church New Year (Revised Julian calendar)The Indiction, the start of the church year.Orthodox Church in America, computedDetails →125th anniversary: The first science fiction film, titled A Trip to the Moon and based on From the...In 1902, The first science fiction film, titled A Trip to the Moon and based on From the Earth to the Moon by Jules Verne, was released in France.WikipediaDetails →75th anniversary: Ernest Hemingway's novel The Old Man and the SeaIn 1952, Ernest Hemingway's novel The Old Man and the Sea, which later won the Pulitzer Prize for Fiction, was first published.WikipediaDetails →Francis William Aston, born 1877 (150 years)English chemist and physicist, Nobel Prize laureate (died 1945).WikipediaDetails →
Broadcom earnings (Q3 FY2027)Broadcom (AVGO)Broadcom reports Q3 FY2027 results after the market closes.EarningsDetails →
C3.ai earnings (Q1 FY2028)C3.ai (AI)C3.ai reports Q1 FY2028 results after the market closes.EarningsDetails →
Hewlett Packard Enterprise earnings (Q3 FY2027)Hewlett Packard Enterprise (HPE)Hewlett Packard Enterprise reports Q3 FY2027 results after the market closes.EarningsDetails →
NetApp earnings (Q1 FY2028)NetApp (NTAP)NetApp reports Q1 FY2028 results after the market closes.EarningsDetails →
Snowflake earnings (Q2 FY2028)Snowflake (SNOW)Snowflake reports Q2 FY2028 results after the market closes.EarningsDetails →ABN AMRO + Techstars Future of Finance Accelerator Fall 2027 batch startsAmsterdam · TechstarsABN AMRO + Techstars Future of Finance Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Anthropic retires claude-fable-5-1AnthropicClaude API ends support for this model.AnthropicDetails →Anthropic retires claude-mythos-5-1AnthropicClaude API ends support for this model.AnthropicDetails →Canada Fintech Forum 2027Montreal, Canada · Finance MontréalThis international gathering showcases emerging global trends in fintech, new technology solutions for the financial industry, and emerging fintech startups.Finance MontréalDetails →CogX Festival 2027London, United Kingdom · CogXA global festival exploring the impact of AI and emerging technologies on industry, government, and society.CogXDetails →Google for Startups Accelerator: Australia and New Zealand 2027 batch startsSydney (hybrid) · Google for Startups AcceleratorGoogle for Startups Accelerator: Australia and New Zealand 2027 begins. Estimated for September 2027, not announced yet.Google for Startups AcceleratorDetails →Google for Startups Accelerator: Europe and Israel: AI for Energy 2027 batch startsEurope and Israel · Google for Startups AcceleratorGoogle for Startups Accelerator: Europe and Israel: AI for Energy 2027 begins. Estimated for September 2027, not announced yet.Google for Startups AcceleratorDetails →Google for Startups Accelerator: North America: AI for Energy 2027 batch startsNorth America · Google for Startups AcceleratorGoogle for Startups Accelerator: North America: AI for Energy 2027 begins. Estimated for September 2027, not announced yet.Google for Startups AcceleratorDetails →Google for Startups Accelerator: South Africa 2027 batch startsSouth Africa · Google for Startups AcceleratorGoogle for Startups Accelerator: South Africa 2027 begins. Estimated for September 2027, not announced yet.Google for Startups AcceleratorDetails →Innovation in Minnesota: Advanced Manufacturing & Industrial 2027MN · Greater MSPThis event explores automation, smart systems, new materials, and cutting-edge production technologies, bringing together leaders in Minnesota's advanced...Greater MSPDetails →Microsoft retires claude-mythos-5-1MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →Microsoft retires claude-opus-4-8 (1)MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →Techstars Alabama EnergyTech Accelerator Fall 2027 batch startsBirmingham · TechstarsTechstars Alabama EnergyTech Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Techstars Boulder Fall 2027 batch startsBoulder · TechstarsTechstars Boulder Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Techstars Columbus Powered by The Ohio State University Fall 2027 batch startsColumbus · TechstarsTechstars Columbus Powered by The Ohio State University Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Techstars Future of Food Powered by Ecolab Fall 2027 batch startsMinneapolis-St. Paul · TechstarsTechstars Future of Food Powered by Ecolab Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Techstars Healthcare Accelerator powered by Permanente Medicine Fall 2027 batch startsMid-Atlantic (DC, VA, MD) · TechstarsTechstars Healthcare Accelerator powered by Permanente Medicine Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Techstars Space Accelerator Fall 2027 batch startsUnited States · TechstarsTechstars Space Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.TechstarsDetails →Vietnam AI Law: Transition ends for existing AI systems in health, education and financeVietnamExisting AI systems in healthcare, education and finance must comply (18-month transition).RegulationsDetails →National Day (Vietnam)VietnamA public holiday in Vietnam, known locally as Quốc khánh.Nager.DateDetails →Frederick Soddy, born 1877 (150 years)English chemist and academic, Nobel Prize laureate (died 1956).WikipediaDetails →
Asana earnings (Q2 FY2028)Asana (ASAN)Asana reports Q2 FY2028 results after the market closes.EarningsDetails →
Ciena earnings (Q3 FY2027)Ciena (CIEN)Ciena reports Q3 FY2027 results before the market opens.EarningsDetails →
Docusign earnings (Q2 FY2028)Docusign (DOCU)Docusign reports Q2 FY2028 results after the market closes.EarningsDetails →
Samsara earnings (Q2 FY2028)Samsara (IOT)Samsara reports Q2 FY2028 results after the market closes.EarningsDetails →
UiPath earnings (Q2 FY2028)UiPath (PATH)UiPath reports Q2 FY2028 results after the market closes.EarningsDetails →
Zscaler earnings (Q4 FY2027)Zscaler (ZS)Zscaler reports Q4 FY2027 results after the market closes.EarningsDetails →Mario Draghi, born 1947 (80 years)Italian banker and economist.WikipediaDetails →Ganesh ChaturthiThe birth of Ganesha; a ten-day festival ending with immersion (Anant Chaturdashi). Bhadrapada, Shukla 4. Regional dates can differ by a day.Wikipedia, computedDetails →50th anniversary: The Golden Dragon massacre occurred in Chinatown, San Francisco, United States,...In 1977, The Golden Dragon massacre occurred in Chinatown, San Francisco, United States, leaving five people dead and spurring police to end Chinese gang...WikipediaDetails →Microsoft retires Microsoft Teams DisplaysMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Das Lakshana Parva (Digambara)Ten days on the ten virtues, the Digambara Paryushana, ending on Anant Chaturdashi. Bhadrapada, Shukla 5. Regional dates can differ by a day.Wikipedia, computedDetails →2027 Italian Grand PrixMonza Circuit, MonzaFormula One Italian Grand Prix race day.WikipediaDetails →50th anniversary: NASA launched the space probe Voyager 1, currently the farthest spacecraft from...In 1977, NASA launched the space probe Voyager 1, currently the farthest spacecraft from Earth, from Launch Complex 41 at Cape Canaveral Air Force Station.WikipediaDetails →International Day of CharityA United Nations international day.United NationsDetails →International Day of the World’s Indigenous Women and GirlsA United Nations international day.United NationsDetails →Labor DayUnited StatesA public holiday in the United States, officially Labor Day.Nager.DateDetails →US stock markets closed: Labor Day 2027New York Stock Exchange, New YorkNYSE markets are closed for Labor Day.NYSEDetails →Labour Day (Puerto Rico)Puerto RicoA public holiday in Puerto Rico, known locally as Día del Trabajo.Nager.DateDetails →75th anniversary: A prototype aircraft crashed at the Farnborough Airshow in Hampshire, EnglandIn 1952, A prototype aircraft crashed at the Farnborough Airshow in Hampshire, England, killing the pilot and test observer on board, and 29 spectators.WikipediaDetails →375th anniversary: Chinese peasants on Formosa (now Taiwan) began a rebellion against Dutch rule...In 1652, Chinese peasants on Formosa (now Taiwan) began a rebellion against Dutch rule which was suppressed four days later.WikipediaDetails →Independence Day (Brazil)BrazilA public holiday in Brazil, known locally as Dia da Independência.Nager.DateDetails →First quarter moonThe Moon is half lit (waxing).NASA, computedDetails →82nd session of the UN General Assembly opensUN Headquarters, New YorkThe 82nd session of the United Nations General Assembly opens at 3 p.m. in New York; the general debate date is not yet set.United NationsDetails →International Day of Clean Air for Blue SkiesA United Nations international day.United NationsDetails →International Day of Police CooperationA United Nations international day.United NationsDetails →World Duchenne Awareness DayA United Nations international day.United NationsDetails →
Braze earnings (Q2 FY2028)Braze (BRZE)Braze reports Q2 FY2028 results after the market closes.EarningsDetails →International Literacy DayA United Nations international day.United NationsDetails →Bank of Canada rate announcement, September 8, 2027Bank of Canada, OttawaScheduled interest rate announcement by the Bank of Canada.Bank of CanadaDetails →ECB monetary policy meetingEuropean Central Bank, FrankfurtThe ECB Governing Council sets euro area interest rates; the decision is published on the last day, followed by the press conference.European Central BankDetails →Nativity of the Blessed Virgin MaryThe birthday of Mary.USCCB liturgical year, computedDetails →Nativity of the Theotokos (Revised Julian calendar)The birth of Mary, one of the Twelve Great Feasts.Orthodox Church in America, computedDetails →
SailPoint earnings (Q2 FY2028)SailPoint (SAIL)SailPoint reports Q2 FY2028 results before the market opens.EarningsDetails →SuperAI 2027Singapore · SuperAIThis global AI summit explores cutting-edge AI breakthroughs, transformative applications, and ethical frameworks for future AI development.SuperAIDetails →Akshay Kumar, born 1967 (60 years)Indian actor and producer.WikipediaDetails →International Day to Protect Education from AttackA United Nations international day.United NationsDetails →
Adobe earnings (Q3 FY2027)Adobe (ADBE)Adobe reports Q3 FY2027 results after the market closes.EarningsDetails →
Oracle earnings (Q1 FY2028)Oracle (ORCL)Oracle reports Q1 FY2028 results after the market closes.EarningsDetails →Peru AI Law and Regulation: Private sector: transport, commerce, labourPeruObligations apply two years after publication.RegulationsDetails →2027 World Athletics ChampionshipsBeijingTrack and field world championships.WikipediaDetails →Sung Jae-gi, born 1967 (60 years)South Korean activist, founded Man of Korea (died 2013).WikipediaDetails →Enkutatash (Ethiopia)EthiopiaA public holiday in Ethiopia.Nager.DateDetails →ACT national test date (projected)US test centersProjected national ACT test date for 2027-28.ACTDetails →Enkutatash and Nayrouz (Ethiopian and Coptic New Year)Meskerem 1 (Thout 1): the Ethiopian year 2020 and the Coptic year of the Martyrs 1744 begin.Ethiopian Orthodox Tewahedo Church, computedDetails →Onam (Thiruvonam)Kerala’s harvest festival and the homecoming of King Mahabali: pookalam flower carpets, the Onasadya feast and snake-boat races. Thiruvonam day in the month...Wikipedia, computedDetails →2027 Spanish Grand PrixMadring, MadridFormula One Spanish Grand Prix race day.WikipediaDetails →50th anniversary: South African anti-apartheid activist Steve Biko died after being beaten in...In 1977, South African anti-apartheid activist Steve Biko died after being beaten in police custody in Port Elizabeth.WikipediaDetails →Gahambar Paitishahem (harvest)The third Gahambar, the grain harvest, in the Fasli calendar.avesta.org Zoroastrian calendars, computedDetails →75th anniversary: Three boys in Flatwoods, West Virginia, U.S., reported seeing a ten-foot-tall...In 1952, Three boys in Flatwoods, West Virginia, U.S., reported seeing a ten-foot-tall (3 m) monster in the woods while investigating a UFO.WikipediaDetails →Hans Zimmer, born 1957 (70 years)German composer and producer.WikipediaDetails →National Grandparents DayThe first Sunday after Labor Day.US Code, computedDetails →United Nations Day for South-South CooperationA United Nations international day.United NationsDetails →All-In Summit 2027Los Angeles, CA · All-In SummitThis summit convenes influential thinkers, investors, founders, and leaders to shape the future of business, technology, and society.All-In SummitDetails →EU Data Act: Unfair-terms rules extend to older long-term contractsEuropean UnionChapter IV (unfair contractual terms) applies to contracts concluded on or before 12 Sep 2025 that are of indefinite duration or expire at least 10 years...RegulationsDetails →dbt Summit 2027Las Vegas, NV · dbt LabsDbt Summit is the world's largest gathering of dbt community members, bringing together data leaders and practitioners to shape the future of data and AI.dbt LabsDetails →Microsoft retires Cohere-rerank-v4.0-fast (1)MicrosoftMicrosoft Foundry ends support for this model; the replacement is Cohere-rerank-v5-fast.MicrosoftDetails →Microsoft retires Cohere-rerank-v4.0-pro (1)MicrosoftMicrosoft Foundry ends support for this model; the replacement is Cohere-rerank-v5-pro.MicrosoftDetails →FOMC meetingFederal Reserve, WashingtonThe Federal Open Market Committee sets US interest rates; the statement comes at 2:00 pm ET on the last day, with the Summary of Economic Projections.Federal ReserveDetails →275th anniversary: Under the terms of the Calendar (New Style) Act 1750, the British Empire...In 1752, Under the terms of the Calendar (New Style) Act 1750, the British Empire adopted the Gregorian calendar, skipping 11 days of the month.WikipediaDetails →Chuseok (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →
| Date | Event | |||
|---|---|---|---|---|
| Coming upMay 2027 | ||||
| May 17Monin 6 months | Ordinary Time (after Pentecost)The long second stretch of Ordinary Time, from the day after Pentecost to the Saturday before Advent.Religion · Catholic · to Nov 27 · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) |
| 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 upAugust 2027 | ||||
| Aug 26Thuin 9 months | Minnesota State Fair 2027The Great Minnesota Get-Together: twelve days ending on Labor Day.Culture · Minnesota · to Sep 6 · State Fairgrounds, Falcon Heights · Minnesota State Fair | State Fairgrounds, Falcon Heights | annual | Minnesota State FairComputed (rule) |
| Aug 27Friin 9 months | 2027 FIBA Basketball World CupMen's basketball world championship.Sports · Other sports · to Sep 12 · Qatar · Wikipedia | Qatar | every few years | Wikipedia |
| Aug 28Satin 9 months | Paryushana (Svetambara)TentativeEight days of fasting and reflection, the holiest time of the Jain year, ending on Samvatsari, the day of forgiveness (Michhami Dukkadam). Bhadrapada,...Religion · Jainism · to Sep 4 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 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 |
| Meta Connect 2027UnverifiedTentativeMeta's annual developer event for AI, mixed reality, and smart glasses, showcasing Llama models and the next computing platform.Tech · Conferences · Menlo Park, SF Bay Area, CA · Meta | Menlo Park, SF Bay Area, CA; Meta | annual | Meta | |
| Orthodox Church New Year (Revised Julian calendar)The Indiction, the start of the church year.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| 125th anniversary: The first science fiction film, titled A Trip to the Moon and based on From the...In 1902, The first science fiction film, titled A Trip to the Moon and based on From the Earth to the Moon by Jules Verne, was released in France.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 75th anniversary: Ernest Hemingway's novel The Old Man and the SeaIn 1952, Ernest Hemingway's novel The Old Man and the Sea, which later won the Pulitzer Prize for Fiction, was first published.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Francis William Aston, born 1877 (150 years)English chemist and physicist, Nobel Prize laureate (died 1945).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| Broadcom earnings (Q3 FY2027)TentativeBroadcom reports Q3 FY2027 results after the market closes.Economy · Earnings · Broadcom (AVGO) · Earnings | Broadcom (AVGO) | quarterly | Earnings | |
| C3.ai earnings (Q1 FY2028)TentativeC3.ai reports Q1 FY2028 results after the market closes.Economy · Earnings · C3.ai (AI) · Earnings | C3.ai (AI) | quarterly | Earnings | |
| Hewlett Packard Enterprise earnings (Q3 FY2027)TentativeHewlett Packard Enterprise reports Q3 FY2027 results after the market closes.Economy · Earnings · Hewlett Packard Enterprise (HPE) · Earnings | Hewlett Packard Enterprise (HPE) | quarterly | Earnings | |
| NetApp earnings (Q1 FY2028)TentativeNetApp reports Q1 FY2028 results after the market closes.Economy · Earnings · NetApp (NTAP) · Earnings | NetApp (NTAP) | quarterly | Earnings | |
| Snowflake earnings (Q2 FY2028)TentativeSnowflake reports Q2 FY2028 results after the market closes.Economy · Earnings · Snowflake (SNOW) · Earnings | Snowflake (SNOW) | quarterly | Earnings | |
| ABN AMRO + Techstars Future of Finance Accelerator Fall 2027 batch startsTentativeABN AMRO + Techstars Future of Finance Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Amsterdam · Techstars | Amsterdam; Techstars | – | Techstars | |
| Anthropic retires claude-fable-5-1TentativeClaude API ends support for this model.Tech · Retirements · Anthropic · Anthropic | Anthropic | one-off | Anthropic | |
| Anthropic retires claude-mythos-5-1TentativeClaude API ends support for this model.Tech · Retirements · Anthropic · Anthropic | Anthropic | one-off | Anthropic | |
| Canada Fintech Forum 2027UnverifiedTentativeThis international gathering showcases emerging global trends in fintech, new technology solutions for the financial industry, and emerging fintech startups.Tech · Conferences · Montreal, Canada · Finance Montréal | Montreal, Canada; Finance Montréal | annual | Finance Montréal | |
| CogX Festival 2027UnverifiedTentativeA global festival exploring the impact of AI and emerging technologies on industry, government, and society.Tech · Conferences · London, United Kingdom · CogX | London, United Kingdom; CogX | annual | CogX | |
| Google for Startups Accelerator: Australia and New Zealand 2027 batch startsTentativeGoogle for Startups Accelerator: Australia and New Zealand 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Sydney (hybrid) · Google for Startups Accelerator | Sydney (hybrid); Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Google for Startups Accelerator: Europe and Israel: AI for Energy 2027 batch startsTentativeGoogle for Startups Accelerator: Europe and Israel: AI for Energy 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Europe and Israel · Google for Startups Accelerator | Europe and Israel; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Google for Startups Accelerator: North America: AI for Energy 2027 batch startsTentativeGoogle for Startups Accelerator: North America: AI for Energy 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · North America · Google for Startups Accelerator | North America; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Google for Startups Accelerator: South Africa 2027 batch startsTentativeGoogle for Startups Accelerator: South Africa 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · South Africa · Google for Startups Accelerator | South Africa; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Innovation in Minnesota: Advanced Manufacturing & Industrial 2027UnverifiedTentativeThis event explores automation, smart systems, new materials, and cutting-edge production technologies, bringing together leaders in Minnesota's advanced...Tech · Conferences · MN · Greater MSP | MN; Greater MSP | annual | Greater MSP | |
| Microsoft retires claude-mythos-5-1UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires claude-opus-4-8 (1)UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Techstars Alabama EnergyTech Accelerator Fall 2027 batch startsTentativeTechstars Alabama EnergyTech Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Birmingham · Techstars | Birmingham; Techstars | – | Techstars | |
| Techstars Boulder Fall 2027 batch startsTentativeTechstars Boulder Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Boulder · Techstars | Boulder; Techstars | – | Techstars | |
| Techstars Columbus Powered by The Ohio State University Fall 2027 batch startsTentativeTechstars Columbus Powered by The Ohio State University Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Columbus · Techstars | Columbus; Techstars | – | Techstars | |
| Techstars Future of Food Powered by Ecolab Fall 2027 batch startsTentativeTechstars Future of Food Powered by Ecolab Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Minneapolis-St. Paul · Techstars | Minneapolis-St. Paul; Techstars | – | Techstars | |
| Techstars Healthcare Accelerator powered by Permanente Medicine Fall 2027 batch startsTentativeTechstars Healthcare Accelerator powered by Permanente Medicine Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · Mid-Atlantic (DC, VA, MD) · Techstars | Mid-Atlantic (DC, VA, MD); Techstars | – | Techstars | |
| Techstars Space Accelerator Fall 2027 batch startsTentativeTechstars Space Accelerator Fall 2027 begins. Estimated for September 2027, not announced yet.Tech · Accelerators · to Sep 30 · United States · Techstars | United States; Techstars | – | Techstars | |
| Vietnam AI Law: Transition ends for existing AI systems in health, education and financeExisting AI systems in healthcare, education and finance must comply (18-month transition).Tech · Compliance deadlines · Vietnam · Regulations | Vietnam | one-off | Regulations | |
| Sep 2Thuin 9 months | National Day (Vietnam)A public holiday in Vietnam, known locally as Quốc khánh.Holidays · Vietnam · Vietnam · Nager.Date | Vietnam | annual | Nager.Date |
| Frederick Soddy, born 1877 (150 years)English chemist and academic, Nobel Prize laureate (died 1956).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| Asana earnings (Q2 FY2028)TentativeAsana reports Q2 FY2028 results after the market closes.Economy · Earnings · Asana (ASAN) · Earnings | Asana (ASAN) | quarterly | Earnings | |
| Ciena earnings (Q3 FY2027)TentativeCiena reports Q3 FY2027 results before the market opens.Economy · Earnings · Ciena (CIEN) · Earnings | Ciena (CIEN) | quarterly | Earnings | |
| Docusign earnings (Q2 FY2028)TentativeDocusign reports Q2 FY2028 results after the market closes.Economy · Earnings · Docusign (DOCU) · Earnings | Docusign (DOCU) | quarterly | Earnings | |
| Samsara earnings (Q2 FY2028)TentativeSamsara reports Q2 FY2028 results after the market closes.Economy · Earnings · Samsara (IOT) · Earnings | Samsara (IOT) | quarterly | Earnings | |
| UiPath earnings (Q2 FY2028)TentativeUiPath reports Q2 FY2028 results after the market closes.Economy · Earnings · UiPath (PATH) · Earnings | UiPath (PATH) | quarterly | Earnings | |
| Zscaler earnings (Q4 FY2027)TentativeZscaler reports Q4 FY2027 results after the market closes.Economy · Earnings · Zscaler (ZS) · Earnings | Zscaler (ZS) | quarterly | Earnings | |
| Sep 3Friin 9 months | Mario Draghi, born 1947 (80 years)Italian banker and economist.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| Sep 4Satin 9 months | Ganesh ChaturthiTentativeThe birth of Ganesha; a ten-day festival ending with immersion (Anant Chaturdashi). Bhadrapada, Shukla 4. Regional dates can differ by a day.Religion · Hinduism · to Sep 14 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 50th anniversary: The Golden Dragon massacre occurred in Chinatown, San Francisco, United States,...In 1977, The Golden Dragon massacre occurred in Chinatown, San Francisco, United States, leaving five people dead and spurring police to end Chinese gang...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Microsoft retires Microsoft Teams DisplaysUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Sep 5Sunin 10 months | Das Lakshana Parva (Digambara)TentativeTen days on the ten virtues, the Digambara Paryushana, ending on Anant Chaturdashi. Bhadrapada, Shukla 5. Regional dates can differ by a day.Religion · Jainism · to Sep 14 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 2027 Italian Grand PrixFormula One Italian Grand Prix race day.Sports · Formula 1 · Monza Circuit, Monza · Wikipedia | Monza Circuit, Monza | annual | Wikipedia | |
| 50th anniversary: NASA launched the space probe Voyager 1, currently the farthest spacecraft from...In 1977, NASA launched the space probe Voyager 1, currently the farthest spacecraft from Earth, from Launch Complex 41 at Cape Canaveral Air Force Station.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of CharityA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| International Day of the World’s Indigenous Women and GirlsA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 6Monin 10 months | Labor DayA public holiday in the United States, officially Labor Day.Holidays · United States · United States · Nager.Date | United States | annual | Nager.Date |
| US stock markets closed: Labor Day 2027NYSE markets are closed for Labor Day.Economy · Market holidays · New York Stock Exchange, New York · NYSE | New York Stock Exchange, New York | annual | NYSE | |
| Labour Day (Puerto Rico)A public holiday in Puerto Rico, known locally as Día del Trabajo.Holidays · Puerto Rico · Puerto Rico · Nager.Date | Puerto Rico | annual | Nager.Date | |
| 75th anniversary: A prototype aircraft crashed at the Farnborough Airshow in Hampshire, EnglandIn 1952, A prototype aircraft crashed at the Farnborough Airshow in Hampshire, England, killing the pilot and test observer on board, and 29 spectators.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Sep 7Tuein 10 months | 375th anniversary: Chinese peasants on Formosa (now Taiwan) began a rebellion against Dutch rule...In 1652, Chinese peasants on Formosa (now Taiwan) began a rebellion against Dutch rule which was suppressed four days later.History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| Independence Day (Brazil)A public holiday in Brazil, known locally as Dia da Independência.Holidays · Brazil · Brazil · Nager.Date | Brazil | annual | Nager.Date | |
| First quarter moonThe Moon is half lit (waxing).Sky · Moon phases · 1:31 pm CT · NASA | – | monthly | NASAComputed (rule) | |
| 82nd session of the UN General Assembly opensThe 82nd session of the United Nations General Assembly opens at 3 p.m. in New York; the general debate date is not yet set.Politics · Summits · UN Headquarters, New York · United Nations | UN Headquarters, New York | annual | United Nations | |
| International Day of Clean Air for Blue SkiesA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| International Day of Police CooperationA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| World Duchenne Awareness DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Braze earnings (Q2 FY2028)TentativeBraze reports Q2 FY2028 results after the market closes.Economy · Earnings · Braze (BRZE) · Earnings | Braze (BRZE) | quarterly | Earnings | |
| Sep 8Wedin 10 months | International Literacy DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations |
| Bank of Canada rate announcement, September 8, 2027Scheduled interest rate announcement by the Bank of Canada.Economy · Other central banks · Bank of Canada, Ottawa · Bank of Canada | Bank of Canada, Ottawa | annual | Bank of Canada | |
| ECB monetary policy meetingThe ECB Governing Council sets euro area interest rates; the decision is published on the last day, followed by the press conference.Economy · Other central banks · 2:15 pm GMT+2 · to Sep 9 · European Central Bank, Frankfurt · European Central Bank | European Central Bank, Frankfurt | eight times a year | European Central Bank | |
| Nativity of the Blessed Virgin MaryThe birthday of Mary.Religion · Catholic · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| Nativity of the Theotokos (Revised Julian calendar)The birth of Mary, one of the Twelve Great Feasts.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| SailPoint earnings (Q2 FY2028)TentativeSailPoint reports Q2 FY2028 results before the market opens.Economy · Earnings · SailPoint (SAIL) · Earnings | SailPoint (SAIL) | quarterly | Earnings | |
| SuperAI 2027UnverifiedThis global AI summit explores cutting-edge AI breakthroughs, transformative applications, and ethical frameworks for future AI development.Tech · Conferences · to Sep 9 · Singapore · SuperAI | Singapore; SuperAI | annual | SuperAI | |
| Sep 9Thuin 10 months | Akshay Kumar, born 1967 (60 years)Indian actor and producer.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| International Day to Protect Education from AttackA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Adobe earnings (Q3 FY2027)TentativeAdobe reports Q3 FY2027 results after the market closes.Economy · Earnings · Adobe (ADBE) · Earnings | Adobe (ADBE) | quarterly | Earnings | |
| Oracle earnings (Q1 FY2028)TentativeOracle reports Q1 FY2028 results after the market closes.Economy · Earnings · Oracle (ORCL) · Earnings | Oracle (ORCL) | quarterly | Earnings | |
| Sep 10Friin 10 months | Peru AI Law and Regulation: Private sector: transport, commerce, labourTentativeObligations apply two years after publication.Tech · Compliance deadlines · Peru · Regulations | Peru | one-off | Regulations |
| Sep 11Satin 10 months | 2027 World Athletics ChampionshipsTrack and field world championships.Sports · Marathons and athletics · to Sep 19 · Beijing · Wikipedia | Beijing | every few years | Wikipedia |
| Sung Jae-gi, born 1967 (60 years)South Korean activist, founded Man of Korea (died 2013).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| Enkutatash (Ethiopia)A public holiday in Ethiopia.Holidays · Ethiopia · Ethiopia · Nager.Date | Ethiopia | annual | Nager.Date | |
| ACT national test date (projected)TentativeProjected national ACT test date for 2027-28.Academic · Exams · US test centers · ACT | US test centers | annual | ACT | |
| Sep 12Sunin 10 months | Enkutatash and Nayrouz (Ethiopian and Coptic New Year)Meskerem 1 (Thout 1): the Ethiopian year 2020 and the Coptic year of the Martyrs 1744 begin.Religion · Oriental Orthodox (Coptic, Ethiopian, Armenian) · Ethiopian Orthodox Tewahedo Church | – | annual | Ethiopian Orthodox Tewahedo ChurchComputed (rule) |
| Onam (Thiruvonam)TentativeKerala’s harvest festival and the homecoming of King Mahabali: pookalam flower carpets, the Onasadya feast and snake-boat races. Thiruvonam day in the month...Religion · Hinduism · Wikipedia | – | annual | WikipediaComputed (rule) | |
| 2027 Spanish Grand PrixFormula One Spanish Grand Prix race day.Sports · Formula 1 · Madring, Madrid · Wikipedia | Madring, Madrid | annual | Wikipedia | |
| 50th anniversary: South African anti-apartheid activist Steve Biko died after being beaten in...In 1977, South African anti-apartheid activist Steve Biko died after being beaten in police custody in Port Elizabeth.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Gahambar Paitishahem (harvest)The third Gahambar, the grain harvest, in the Fasli calendar.Religion · Zoroastrianism · to Sep 16 · avesta.org Zoroastrian calendars | – | annual | avesta.org Zoroastrian calendarsComputed (rule) | |
| 75th anniversary: Three boys in Flatwoods, West Virginia, U.S., reported seeing a ten-foot-tall...In 1952, Three boys in Flatwoods, West Virginia, U.S., reported seeing a ten-foot-tall (3 m) monster in the woods while investigating a UFO.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Hans Zimmer, born 1957 (70 years)German composer and producer.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| National Grandparents DayThe first Sunday after Labor Day.Observances · Days · US Code | – | annual | US CodeComputed (rule) | |
| United Nations Day for South-South CooperationA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| All-In Summit 2027UnverifiedThis summit convenes influential thinkers, investors, founders, and leaders to shape the future of business, technology, and society.Tech · Conferences · to Sep 14 · Los Angeles, CA · All-In Summit | Los Angeles, CA; All-In Summit | annual | All-In Summit | |
| EU Data Act: Unfair-terms rules extend to older long-term contractsChapter IV (unfair contractual terms) applies to contracts concluded on or before 12 Sep 2025 that are of indefinite duration or expire at least 10 years...Tech · Compliance deadlines · European Union · Regulations | European Union | one-off | Regulations | |
| Sep 13Monin 10 months | dbt Summit 2027UnverifiedDbt Summit is the world's largest gathering of dbt community members, bringing together data leaders and practitioners to shape the future of data and AI.Tech · Conferences · to Sep 16 · Las Vegas, NV · dbt Labs | Las Vegas, NV; dbt Labs | annual | dbt Labs |
| Microsoft retires Cohere-rerank-v4.0-fast (1)UnverifiedMicrosoft Foundry ends support for this model; the replacement is Cohere-rerank-v5-fast.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires Cohere-rerank-v4.0-pro (1)UnverifiedMicrosoft Foundry ends support for this model; the replacement is Cohere-rerank-v5-pro.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Sep 14Tuein 10 months | FOMC meetingTentativeThe Federal Open Market Committee sets US interest rates; the statement comes at 2:00 pm ET on the last day, with the Summary of Economic Projections.Economy · Federal Reserve · 1:00 pm ET · to Sep 15 · Federal Reserve, Washington · Federal Reserve | Federal Reserve, Washington | eight times a year | Federal Reserve |
| 275th anniversary: Under the terms of the Calendar (New Style) Act 1750, the British Empire...In 1752, Under the terms of the Calendar (New Style) Act 1750, the British Empire adopted the Gregorian calendar, skipping 11 days of the month.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Chuseok (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date | |