Calendarby GlyphSeptember 2023 calendar
September 2023
PastDecember 2023
PastOctober 2023
2023 Rugby World CupFranceThe rugby union World Cup.WikipediaDetails →Vassa (Buddhist Rains Retreat)The three-month rains retreat of Theravada monks, from Khao Phansa, the day after Asalha Puja, to Ok Phansa.Bank of Thailand holiday calendarDetails →National Hispanic Heritage MonthNational Hispanic Heritage Month, observed across the US.Library of Congress and partners, computedDetails →SukkotThe Festival of Booths. Begins at sundown on Fri, September 29, 2023.Hebcal, computedDetails →Pycon India 2023Hyderabad, India · IndependentA four-day tech conference in Hyderabad, India.IndependentDetails →2023 Ryder CupMarco Simone Golf and Country Club, RomeEurope against the United States.WikipediaDetails →Central Ohio Software Symposium 2023Online · IndependentA three-day tech conference, held online.IndependentDetails →
PastSeptember 2023
Chuseok (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →Day following the Mid-Autumn Festival (Hong Kong)Hong KongA public holiday in Hong Kong.Nager.DateDetails →National Day for Truth and Reconciliation (Canada)CanadaA public holiday in Canada.Nager.DateDetails →25th anniversary: The Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit...In 1998, The Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit organization that manages the assignment of domain names and IP addresses...WikipediaDetails →International Translation DayA United Nations international day.United NationsDetails →DEV: Challenge Accepted 2023Sofia, Bulgaria · IndependentA tech conference in Sofia, Bulgaria.IndependentDetails →Paris Web 2023Paris, France · IndependentA three-day tech conference in Paris, France.IndependentDetails →Full moon: Harvest Moon (supermoon)Traditional North American name: Harvest Moon. Moon 361,545 km from Earth, close enough to count as a supermoon.NASA, computedDetails →Mid-Autumn FestivalMooncakes under the harvest full moon; Chuseok in Korea falls on the same day. Day 15 of lunar month 8.Hong Kong Observatory, computedDetails →100th anniversary: The Mandate for Palestine came into effect, officially creating the...In 1923, The Mandate for Palestine came into effect, officially creating the protectorates of Mandatory Palestine under British administration and Transjordan...WikipediaDetails →Lech Wałęsa, born 1943 (80 years)Polish electrician and politician, 2nd President of Poland, Nobel Prize laureate.WikipediaDetails →Chuseok (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →Mid-Autumn Festival (China)ChinaA public holiday in China.Nager.DateDetails →Cao Dai: Festival of the Holy MotherThe feast of the Mother Goddess (Dieu Tri Kim Mau) at Tay Ninh. Day 15 of lunar month 8.Hong Kong Observatory, computedDetails →Michaelmas (Saints Michael, Gabriel and Raphael)The feast of the archangels; in England one of the old quarter days.USCCB liturgical year, computedDetails →International Day of Awareness of Food Loss and WasteA United Nations international day.United NationsDetails →APAC Data 2030 SummitSingapore · IndependentA tech conference in Singapore.IndependentDetails →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 →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 →Meskel (Finding of the True Cross)Bonfires (Demera) for the finding of the Cross by Empress Helena; UNESCO intangible heritage. The Coptic Feast of the Cross falls on the same day.Ethiopian Orthodox Tewahedo Church, computedDetails →Chuseok (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →St. Wenceslas Day (Czechia)CzechiaA public holiday in Czechia, known locally as Den české státnosti.Nager.DateDetails →Confucius’s Birthday (Teachers’ Day, Taiwan)The Grand Ceremony at Taipei’s Confucius Temple and at Qufu, the birthplace of Confucius.Wikipedia, computedDetails →International Day for Universal Access to InformationA United Nations international day.United NationsDetails →
Accenture earnings (Q4 FY2023)Accenture (ACN)Accenture reported Q4 FY2023 results before the market opened.EarningsDetails →Conf42 Kube Native 2023Online · IndependentA tech conference, held online.IndependentDetails →Sphere.it Conf 2023Kraków, Poland · IndependentA two-day tech conference in Kraków, Poland.IndependentDetails →DevOpsCon New York 2023Berlin, Germany · IndependentA four-day tech conference in Berlin, Germany.IndependentDetails →Mawlid an-NabiThe birthday of the Prophet Muhammad, celebrated by many Muslims (Shia communities mark it on the 17th). 3/12/1445 AH in the Umm al-Qura calendar. Begins...Umm al-Qura calendar, computedDetails →Meskel (Orthodox) (Ethiopia)EthiopiaA public holiday in Ethiopia.Nager.DateDetails →Prophet Muhammad's Birthday (Egypt)EgyptA public holiday in Egypt.Nager.DateDetails →Elevation of the Holy Cross (Julian calendar)One of the Twelve Great Feasts, a strict fast day. September 14 in the Julian calendar.Orthodox Church in America, computedDetails →World Tourism DayA United Nations international day.United NationsDetails →
Micron earnings (Q4 FY2023)Micron (MU)Micron reported Q4 FY2023 results after the market closed.EarningsDetails →Devopsdays Cairo 2023Cairo, Egypt · IndependentA tech conference in Cairo, Egypt.IndependentDetails →George Gershwin, born 1898 (125 years)American pianist and composer (died 1937).WikipediaDetails →International Day for the Total Elimination of Nuclear WeaponsA United Nations international day.United NationsDetails →
Progress Software earnings (Q3 FY2023)Progress Software (PRGS)Progress Software reported Q3 FY2023 results after the market closed.EarningsDetails →Autumn HiganThe week of the equinox, when Japanese Buddhists visit and tidy family graves.Wikipedia, computedDetails →UN General Assembly general debate 2023UN Headquarters, New YorkWorld leaders address the UN General Assembly.WikipediaDetails →Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Sun, September 24, 2023.Hebcal, computedDetails →Heritage Day (South Africa)South AfricaA public holiday in South Africa.Nager.DateDetails →PyConUK 2023Cardiff, United Kingdom · IndependentA four-day tech conference in Cardiff, United Kingdom.IndependentDetails →Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Fri, September 15, 2023.Hebcal, computedDetails →Data Governance Act: DGA appliesEuropean UnionAll DGA rules apply (Art 38).RegulationsDetails →2023 Berlin MarathonBerlinOne of the six World Marathon Majors.WikipediaDetails →World Maritime DayA United Nations international day.United NationsDetails →Nullcon Goa 2023Goa, India · IndependentA two-day tech conference in Goa, India.IndependentDetails →New England Software Symposium 2023Boston, MA · IndependentA three-day tech conference in Boston, MA.IndependentDetails →September equinoxAutumn begins in the Northern Hemisphere, spring in the Southern.US Naval Observatory, computedDetails →MabonAutumn equinox sabbat. Northern Hemisphere dates.Wheel of the Year, computedDetails →Autumnal Equinox Day (Japan)JapanA public holiday in Japan.Nager.DateDetails →National Hunting and Fishing DayCelebrates hunters and anglers and their role in conservation; the fourth Saturday in September.National Hunting and Fishing Day, computedDetails →National Public Lands DayA fee-free day at national parks and other federal lands; the fourth Saturday in September.National Park Service, computedDetails →Julio Iglesias, born 1943 (80 years)Spanish singer-songwriter.WikipediaDetails →International Day of Sign LanguagesA United Nations international day.United NationsDetails →Devopsdays Fortaleza 2023Fortaleza, Brazil · IndependentA tech conference in Fortaleza, Brazil.IndependentDetails →Software Architecture fwdays 2023Kyiv, Ukraine · IndependentA five-day tech conference in Kyiv, Ukraine.IndependentDetails →Mercury at greatest western elongationMercury is 17.9° from the Sun, best seen in the morning sky.Astronomy Engine, computedDetails →First quarter moonThe Moon is half lit (waxing).NASA, computedDetails →75th anniversary: Led by Gail Halvorsen, the United States Air Force began Operation "Little...In 1948, Led by Gail Halvorsen, the United States Air Force began Operation "Little Vittles", delivering candy to children as part of the Berlin Airlift.WikipediaDetails →Quebec Law 25: Phase 2: main obligations and penaltiesQuebec, CanadaGovernance policies, PIAs, consent, transparency, privacy by default, ADM notices, cross-border PIAs and AMP/penal regime apply.RegulationsDetails →Devopsdays London 2023London, United Kingdom · IndependentA two-day tech conference in London, United Kingdom.IndependentDetails →Fronteers Conference 2023Utrecht, Netherlands · IndependentA two-day tech conference in Utrecht, Netherlands.IndependentDetails →Strange Loop 2023St. Louis, MO · IndependentA two-day tech conference in St. Louis, MO.IndependentDetails →International Day of PeaceA United Nations international day.United NationsDetails →Founders Day (Ghana)GhanaA public holiday in Ghana.Nager.DateDetails →Nativity of the Theotokos (Julian calendar)The birth of Mary, one of the Twelve Great Feasts. September 8 in the Julian calendar.Orthodox Church in America, computedDetails →Big Data LDN 2023London, United Kingdom · IndependentA two-day tech conference in London, United Kingdom.IndependentDetails →Linux Security Summit Europe 2023Bilbao, Spain · IndependentA two-day tech conference in Bilbao, Spain.IndependentDetails →Open Source Summit Europe 2023Bilbao, Spain · IndependentA three-day tech conference in Bilbao, Spain.IndependentDetails →NDC TechTown 2023Kongsberg, Norway · IndependentA four-day tech conference in Kongsberg, Norway.IndependentDetails →50th anniversary: Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in...In 1973, Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in Houston, Texas, in an internationally televised tennis match dubbed the...WikipediaDetails →525th anniversary: A tsunami caused by the Meiō earthquake washed away the building housing the...In 1498, A tsunami caused by the Meiō earthquake washed away the building housing the Great Buddha (pictured) at Kōtoku-in in Kamakura, Japan; the statue has...WikipediaDetails →George R. R. Martin, born 1948 (75 years)American novelist and short story writer.WikipediaDetails →World Cleanup DayA United Nations international day.United NationsDetails →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 →Army Day (Chile)ChileA public holiday in Chile, known locally as Día de las Glorias del Ejército.Nager.DateDetails →Neptune at oppositionNeptune is opposite the Sun: up all night and at its brightest for the year.Astronomy Engine, computedDetails →Jeremy Irons, born 1948 (75 years)English actor, winner of multiple accolades (Oscar, Tony, Emmy, Golden Globe).WikipediaDetails →Salon de la data 2023Nantes, France · IndependentA tech conference in Nantes, France.IndependentDetails →Infobip Shift 2023Zadar, Croatia · IndependentA two-day tech conference in Zadar, Croatia.IndependentDetails →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 →975th anniversary: Byzantine–Seljuk wars: Byzantine forces defeated their Seljuk opponents in the...In 1048, Byzantine–Seljuk wars: Byzantine forces defeated their Seljuk opponents in the flanks of the nocturnal Battle of Kapetron, but learned of their...WikipediaDetails →National holiday (Chile)ChileA public holiday in Chile, known locally as Fiestas Patrias.Nager.DateDetails →Respect for the Aged Day (Japan)JapanA public holiday in Japan.Nager.DateDetails →Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Hebcal, computedDetails →150th anniversary: Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy,...In 1873, Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy, setting off a chain reaction of bank failures.WikipediaDetails →75th anniversary: The Australian cricket team's Invincibles tour of England concludedIn 1948, The Australian cricket team's Invincibles tour of England concluded; they had played 34 matches, including five Tests, without defeat.WikipediaDetails →International Equal Pay DayA United Nations international day.United NationsDetails →World Patient Safety DayA United Nations international day.United NationsDetails →Rosh HashanahThe Jewish New Year. Begins at sundown on Fri, September 15, 2023.Hebcal, computedDetails →
| Date | Event | |||
|---|---|---|---|---|
| PastDecember 2023 | ||||
| May 29Mon2 years ago | Ordinary Time (after Pentecost)The long second stretch of Ordinary Time, from the day after Pentecost to the Saturday before Advent.Religion · Catholic · to Dec 2 · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) |
| PastOctober 2023 | ||||
| Sep 8Fri3 years ago | 2023 Rugby World CupThe rugby union World Cup.Sports · Rugby · to Oct 28 · France · Wikipedia | France | every few years | Wikipedia |
| Aug 2Wed3 years ago | 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 28 · Bank of Thailand holiday calendar | – | annual | Bank of Thailand holiday calendar |
| Sep 15Fri3 years ago | 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 30Sat3 years ago | SukkotThe Festival of Booths. Begins at sundown on Fri, September 29, 2023.Religion · Judaism · to Oct 6 · Hebcal | – | annual | HebcalComputed (rule) |
| Sep 29Fri3 years ago | Pycon India 2023A four-day tech conference in Hyderabad, India.Tech · Conferences · to Oct 2 · Hyderabad, India · Independent | Hyderabad, India; Independent | annual | Independent |
| 2023 Ryder CupEurope against the United States.Sports · Golf · to Oct 1 · Marco Simone Golf and Country Club, Rome · Wikipedia | Marco Simone Golf and Country Club, Rome | every few years | Wikipedia | |
| Central Ohio Software Symposium 2023A three-day tech conference, held online.Tech · Conferences · to Oct 1 · Online · Independent | Online; Independent | annual | Independent | |
| PastSeptember 2023 | ||||
| Sep 30Sat3 years ago | Chuseok (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date |
| Day following the Mid-Autumn Festival (Hong Kong)A public holiday in Hong Kong.Holidays · Hong Kong · Hong Kong · Nager.Date | Hong Kong | annual | Nager.Date | |
| National Day for Truth and Reconciliation (Canada)A public holiday in Canada.Holidays · Canada · Canada · Nager.Date | Canada | annual | Nager.Date | |
| 25th anniversary: The Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit...In 1998, The Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit organization that manages the assignment of domain names and IP addresses...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Translation DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| DEV: Challenge Accepted 2023A tech conference in Sofia, Bulgaria.Tech · Conferences · Sofia, Bulgaria · Independent | Sofia, Bulgaria; Independent | annual | Independent | |
| Sep 28Thu3 years ago | Paris Web 2023A three-day tech conference in Paris, France.Tech · Conferences · to Sep 30 · Paris, France · Independent | Paris, France; Independent | annual | Independent |
| Sep 29Fri3 years ago | Full moon: Harvest Moon (supermoon)Traditional North American name: Harvest Moon. Moon 361,545 km from Earth, close enough to count as a supermoon.Sky · Moon phases · 4:58 am CT · NASA | – | monthly | NASAComputed (rule) |
| Mid-Autumn FestivalMooncakes under the harvest full moon; Chuseok in Korea falls on the same day. Day 15 of lunar month 8.Culture · Lunar calendar festivals · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) | |
| 100th anniversary: The Mandate for Palestine came into effect, officially creating the...In 1923, The Mandate for Palestine came into effect, officially creating the protectorates of Mandatory Palestine under British administration and Transjordan...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Lech Wałęsa, born 1943 (80 years)Polish electrician and politician, 2nd President of Poland, Nobel Prize laureate.People · Birth 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 | |
| Mid-Autumn Festival (China)A public holiday in China.Holidays · China · China · Nager.Date | China | annual | Nager.Date | |
| Cao Dai: Festival of the Holy MotherThe feast of the Mother Goddess (Dieu Tri Kim Mau) at Tay Ninh. Day 15 of lunar month 8.Religion · Cao Dai · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) | |
| Michaelmas (Saints Michael, Gabriel and Raphael)The feast of the archangels; in England one of the old quarter days.Religion · Christianity · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| International Day of Awareness of Food Loss and WasteA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| APAC Data 2030 SummitA tech conference in Singapore.Tech · Conferences · Singapore · Independent | Singapore; Independent | annual | Independent | |
| Sep 20Wed3 years ago | 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 29 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Sep 19Tue3 years ago | 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 29 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Sep 28Thu3 years ago | Meskel (Finding of the True Cross)Bonfires (Demera) for the finding of the Cross by Empress Helena; UNESCO intangible heritage. The Coptic Feast of the Cross falls on the same day.Religion · Oriental Orthodox (Coptic, Ethiopian, Armenian) · Ethiopian Orthodox Tewahedo Church | – | annual | Ethiopian Orthodox Tewahedo ChurchComputed (rule) |
| Chuseok (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date | |
| St. Wenceslas Day (Czechia)A public holiday in Czechia, known locally as Den české státnosti.Holidays · Czechia · Czechia · Nager.Date | Czechia | annual | Nager.Date | |
| Confucius’s Birthday (Teachers’ Day, Taiwan)The Grand Ceremony at Taipei’s Confucius Temple and at Qufu, the birthplace of Confucius.Religion · Confucianism · Wikipedia | – | annual | WikipediaComputed (rule) | |
| International Day for Universal Access to InformationA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Accenture earnings (Q4 FY2023)Accenture reported Q4 FY2023 results before the market opened.Economy · Earnings · Accenture (ACN) · Earnings | Accenture (ACN) | quarterly | Earnings | |
| Conf42 Kube Native 2023A tech conference, held online.Tech · Conferences · Online · Independent | Online; Independent | annual | Independent | |
| Sep 27Wed3 years ago | Sphere.it Conf 2023A two-day tech conference in Kraków, Poland.Tech · Conferences · to Sep 28 · Kraków, Poland · Independent | Kraków, Poland; Independent | annual | Independent |
| Sep 25Mon3 years ago | DevOpsCon New York 2023A four-day tech conference in Berlin, Germany.Tech · Conferences · to Sep 28 · Berlin, Germany · Independent | Berlin, Germany; Independent | annual | Independent |
| Sep 27Wed3 years ago | Mawlid an-NabiTentativeThe birthday of the Prophet Muhammad, celebrated by many Muslims (Shia communities mark it on the 17th). 3/12/1445 AH in the Umm al-Qura calendar. Begins...Religion · Islam · Umm al-Qura calendar | – | annual | Umm al-Qura calendarComputed (rule) |
| Meskel (Orthodox) (Ethiopia)A public holiday in Ethiopia.Holidays · Ethiopia · Ethiopia · Nager.Date | Ethiopia | annual | Nager.Date | |
| Prophet Muhammad's Birthday (Egypt)A public holiday in Egypt.Holidays · Egypt · Egypt · Nager.Date | Egypt | annual | Nager.Date | |
| Elevation of the Holy Cross (Julian calendar)One of the Twelve Great Feasts, a strict fast day. September 14 in the Julian calendar.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| World Tourism DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Micron earnings (Q4 FY2023)Micron reported Q4 FY2023 results after the market closed.Economy · Earnings · Micron (MU) · Earnings | Micron (MU) | quarterly | Earnings | |
| Devopsdays Cairo 2023A tech conference in Cairo, Egypt.Tech · Conferences · Cairo, Egypt · Independent | Cairo, Egypt; Independent | annual | Independent | |
| Sep 26Tue3 years ago | George Gershwin, born 1898 (125 years)American pianist and composer (died 1937).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| International Day for the Total Elimination of Nuclear WeaponsA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Progress Software earnings (Q3 FY2023)Progress Software reported Q3 FY2023 results after the market closed.Economy · Earnings · Progress Software (PRGS) · Earnings | Progress Software (PRGS) | quarterly | Earnings | |
| Sep 20Wed3 years ago | Autumn HiganThe week of the equinox, when Japanese Buddhists visit and tidy family graves.Religion · Buddhism · to Sep 26 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Sep 19Tue3 years ago | UN General Assembly general debate 2023World leaders address the UN General Assembly.Politics · Summits · to Sep 26 · UN Headquarters, New York · Wikipedia | UN Headquarters, New York | annual | Wikipedia |
| Sep 25Mon3 years ago | Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Sun, September 24, 2023.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) |
| Heritage Day (South Africa)A public holiday in South Africa.Holidays · South Africa · South Africa · Nager.Date | South Africa | annual | Nager.Date | |
| Sep 22Fri3 years ago | PyConUK 2023A four-day tech conference in Cardiff, United Kingdom.Tech · Conferences · to Sep 25 · Cardiff, United Kingdom · Independent | Cardiff, United Kingdom; Independent | annual | Independent |
| Sep 16Sat3 years ago | Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Fri, September 15, 2023.Religion · Judaism · to Sep 25 · Hebcal | – | annual | HebcalComputed (rule) |
| Sep 24Sun3 years ago | Data Governance Act: DGA appliesAll DGA rules apply (Art 38).Tech · Compliance deadlines · European Union · Regulations | European Union | one-off | Regulations |
| 2023 Berlin MarathonOne of the six World Marathon Majors.Sports · Marathons and athletics · Berlin · Wikipedia | Berlin | annual | Wikipedia | |
| World Maritime DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 23Sat3 years ago | Nullcon Goa 2023A two-day tech conference in Goa, India.Tech · Conferences · to Sep 24 · Goa, India · Independent | Goa, India; Independent | annual | Independent |
| Sep 22Fri3 years ago | New England Software Symposium 2023A three-day tech conference in Boston, MA.Tech · Conferences · to Sep 24 · Boston, MA · Independent | Boston, MA; Independent | annual | Independent |
| Sep 23Sat3 years ago | September equinoxAutumn begins in the Northern Hemisphere, spring in the Southern.Sky · Solstices and equinoxes · 1:49 am CT · US Naval Observatory | – | annual | US Naval ObservatoryComputed (rule) |
| MabonAutumn equinox sabbat. Northern Hemisphere dates.Religion · Pagan and Wiccan · Wheel of the Year | – | annual | Wheel of the YearComputed (rule) | |
| Autumnal Equinox Day (Japan)A public holiday in Japan.Holidays · Japan · Japan · Nager.Date | Japan | annual | Nager.Date | |
| National Hunting and Fishing DayCelebrates hunters and anglers and their role in conservation; the fourth Saturday in September.Outdoors · Parks and public lands · National Hunting and Fishing Day | – | annual | National Hunting and Fishing DayComputed (rule) | |
| National Public Lands DayA fee-free day at national parks and other federal lands; the fourth Saturday in September.Outdoors · Parks and public lands · National Park Service | – | annual | National Park ServiceComputed (rule) | |
| Julio Iglesias, born 1943 (80 years)Spanish singer-songwriter.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of Sign LanguagesA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Devopsdays Fortaleza 2023A tech conference in Fortaleza, Brazil.Tech · Conferences · Fortaleza, Brazil · Independent | Fortaleza, Brazil; Independent | annual | Independent | |
| Sep 19Tue3 years ago | Software Architecture fwdays 2023A five-day tech conference in Kyiv, Ukraine.Tech · Conferences · to Sep 23 · Kyiv, Ukraine · Independent | Kyiv, Ukraine; Independent | annual | Independent |
| Sep 22Fri3 years ago | Mercury at greatest western elongationMercury is 17.9° from the Sun, best seen in the morning sky.Sky · Planets · Astronomy Engine | – | recurring | Astronomy EngineComputed (rule) |
| First quarter moonThe Moon is half lit (waxing).Sky · Moon phases · 2:32 pm CT · NASA | – | monthly | NASAComputed (rule) | |
| 75th anniversary: Led by Gail Halvorsen, the United States Air Force began Operation "Little...In 1948, Led by Gail Halvorsen, the United States Air Force began Operation "Little Vittles", delivering candy to children as part of the Berlin Airlift.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Quebec Law 25: Phase 2: main obligations and penaltiesGovernance policies, PIAs, consent, transparency, privacy by default, ADM notices, cross-border PIAs and AMP/penal regime apply.Tech · Compliance deadlines · Quebec, Canada · Regulations | Quebec, Canada | one-off | Regulations | |
| Sep 21Thu3 years ago | Devopsdays London 2023A two-day tech conference in London, United Kingdom.Tech · Conferences · to Sep 22 · London, United Kingdom · Independent | London, United Kingdom; Independent | annual | Independent |
| Fronteers Conference 2023A two-day tech conference in Utrecht, Netherlands.Tech · Conferences · to Sep 22 · Utrecht, Netherlands · Independent | Utrecht, Netherlands; Independent | annual | Independent | |
| Strange Loop 2023A two-day tech conference in St. Louis, MO.Tech · Conferences · to Sep 22 · St. Louis, MO · Independent | St. Louis, MO; Independent | annual | Independent | |
| International Day of PeaceA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Founders Day (Ghana)A public holiday in Ghana.Holidays · Ghana · Ghana · Nager.Date | Ghana | annual | Nager.Date | |
| Nativity of the Theotokos (Julian calendar)The birth of Mary, one of the Twelve Great Feasts. September 8 in the Julian calendar.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| Sep 20Wed3 years ago | Big Data LDN 2023A two-day tech conference in London, United Kingdom.Tech · Conferences · to Sep 21 · London, United Kingdom · Independent | London, United Kingdom; Independent | annual | Independent |
| Linux Security Summit Europe 2023A two-day tech conference in Bilbao, Spain.Tech · Conferences · to Sep 21 · Bilbao, Spain · Independent | Bilbao, Spain; Independent | annual | Independent | |
| Sep 19Tue3 years ago | Open Source Summit Europe 2023A three-day tech conference in Bilbao, Spain.Tech · Conferences · to Sep 21 · Bilbao, Spain · Independent | Bilbao, Spain; Independent | annual | Independent |
| Sep 18Mon3 years ago | NDC TechTown 2023A four-day tech conference in Kongsberg, Norway.Tech · Conferences · to Sep 21 · Kongsberg, Norway · Independent | Kongsberg, Norway; Independent | annual | Independent |
| Sep 20Wed3 years ago | 50th anniversary: Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in...In 1973, Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in Houston, Texas, in an internationally televised tennis match dubbed the...History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| 525th anniversary: A tsunami caused by the Meiō earthquake washed away the building housing the...In 1498, A tsunami caused by the Meiō earthquake washed away the building housing the Great Buddha (pictured) at Kōtoku-in in Kamakura, Japan; the statue has...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| George R. R. Martin, born 1948 (75 years)American novelist and short story writer.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Cleanup DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 19Tue3 years ago | FOMC meetingThe 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 20 · Federal Reserve, Washington · Federal Reserve | Federal Reserve, Washington | eight times a year | Federal Reserve |
| Army Day (Chile)A public holiday in Chile, known locally as Día de las Glorias del Ejército.Holidays · Chile · Chile · Nager.Date | Chile | annual | Nager.Date | |
| Neptune at oppositionNeptune is opposite the Sun: up all night and at its brightest for the year.Sky · Planets · Astronomy Engine | – | about yearly | Astronomy EngineComputed (rule) | |
| Jeremy Irons, born 1948 (75 years)English actor, winner of multiple accolades (Oscar, Tony, Emmy, Golden Globe).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| Salon de la data 2023A tech conference in Nantes, France.Tech · Conferences · Nantes, France · Independent | Nantes, France; Independent | annual | Independent | |
| Sep 18Mon3 years ago | Infobip Shift 2023A two-day tech conference in Zadar, Croatia.Tech · Conferences · to Sep 19 · Zadar, Croatia · Independent | Zadar, Croatia; Independent | annual | Independent |
| Sep 12Tue3 years ago | 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 19 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Sep 18Mon3 years ago | 975th anniversary: Byzantine–Seljuk wars: Byzantine forces defeated their Seljuk opponents in the...In 1048, Byzantine–Seljuk wars: Byzantine forces defeated their Seljuk opponents in the flanks of the nocturnal Battle of Kapetron, but learned of their...History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| National holiday (Chile)A public holiday in Chile, known locally as Fiestas Patrias.Holidays · Chile · Chile · Nager.Date | Chile | annual | Nager.Date | |
| Respect for the Aged Day (Japan)A public holiday in Japan.Holidays · Japan · Japan · Nager.Date | Japan | annual | Nager.Date | |
| Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) | |
| 150th anniversary: Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy,...In 1873, Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy, setting off a chain reaction of bank failures.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 75th anniversary: The Australian cricket team's Invincibles tour of England concludedIn 1948, The Australian cricket team's Invincibles tour of England concluded; they had played 34 matches, including five Tests, without defeat.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Equal Pay DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 17Sun3 years ago | World Patient Safety DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations |
| Sep 16Sat3 years ago | Rosh HashanahThe Jewish New Year. Begins at sundown on Fri, September 15, 2023.Religion · Judaism · to Sep 17 · Hebcal | – | annual | HebcalComputed (rule) |