Calendarby GlyphSeptember 2029 calendar
September 2029
Coming upMay 2029
Coming upAugust 2029
Ghost MonthThe seventh lunar month, when the gates of the underworld open; the Ghost Festival falls on its 15th day. Day 1 of lunar month 7.Hong Kong Observatory, computedDetails →Minnesota State Fair 2029State Fairgrounds, Falcon HeightsThe Great Minnesota Get-Together: twelve days ending on Labor Day.Minnesota State Fair, computedDetails →
Coming upSeptember 2029
Krishna JanmashtamiThe birth of Krishna, celebrated at midnight. Shravana, Krishna 8. Regional dates can differ by a day.Wikipedia, computedDetails →425th anniversary: The Guru Granth Sahib (folio depicted), the religious text of Sikhism, was...In 1604, The Guru Granth Sahib (folio depicted), the religious text of Sikhism, was installed in the Golden Temple in Amritsar.WikipediaDetails →Leil SelichotThe first night of Ashkenazi penitential prayers (Selichot) before Rosh Hashanah, late on Saturday night.Hebcal, computedDetails →Orthodox Church New Year (Revised Julian calendar)The Indiction, the start of the church year.Orthodox Church in America, computedDetails →225th anniversary: German astronomer Karl Ludwig Harding discovered one of the largest main-belt...In 1804, German astronomer Karl Ludwig Harding discovered one of the largest main-belt asteroids, naming it Juno after the Roman goddess.WikipediaDetails →National Day (Vietnam)VietnamA public holiday in Vietnam, known locally as Quốc khánh.Nager.DateDetails →Labor DayUnited StatesA public holiday in the United States, officially Labor Day.Nager.DateDetails →Labour Day (Puerto Rico)Puerto RicoA public holiday in Puerto Rico, known locally as Día del Trabajo.Nager.DateDetails →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 →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 →Independence Day (Brazil)BrazilA public holiday in Brazil, known locally as Dia da Independência.Nager.DateDetails →25th anniversary: Hurricane Ivan made landfall on Grenada, devastating at least 85 per cent of...In 2004, Hurricane Ivan made landfall on Grenada, devastating at least 85 per cent of buildings on the island.WikipediaDetails →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 →AWS retires emr-spark-8.1 [LTS]AWSAmazon EMR ends support for this runtime.AWSDetails →New moonThe Moon is between Earth and the Sun; darkest nights for stargazing.NASA, computedDetails →International Literacy DayA United Nations international day.United NationsDetails →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 →75th anniversary: Eight nations signed a collective-defense treaty in Manila to create the...In 1954, Eight nations signed a collective-defense treaty in Manila to create the Southeast Asia Treaty Organization (flag pictured), modelled on NATO.WikipediaDetails →75th anniversary: A magnitude-6.7 earthquake struck near ChlefIn 1954, A magnitude-6.7 earthquake struck near Chlef, killing over 1,200 people and forcing the Algerian government to implement comprehensive reforms in...WikipediaDetails →Susilo Bambang Yudhoyono, born 1949 (80 years)Indonesian general and politician, 6th President of Indonesia.WikipediaDetails →International Day to Protect Education from AttackA United Nations international day.United NationsDetails →National Grandparents DayThe first Sunday after Labor Day.US Code, computedDetails →Rosh HashanahThe Jewish New Year. Begins at sundown on Sun, September 9, 2029.Hebcal, computedDetails →250th anniversary: American Revolutionary War: Captain William Pickles of the Continental Navy...In 1779, American Revolutionary War: Captain William Pickles of the Continental Navy boarded and captured the British sloop HMS West Florida at the Battle of...WikipediaDetails →Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Sun, September 9, 2029.Hebcal, computedDetails →Peru AI Law and Regulation: Private sector: all other usesPeruObligations apply four years after publication.RegulationsDetails →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 →Enkutatash and Nayrouz (Ethiopian and Coptic New Year)Meskerem 1 (Thout 1): the Ethiopian year 2022 and the Coptic year of the Martyrs 1746 begin.Ethiopian Orthodox Tewahedo Church, computedDetails →Enkutatash (Ethiopia)EthiopiaA public holiday in Ethiopia.Nager.DateDetails →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 →1650th anniversary: Yax Nuun Ahiin I (depicted) took the throne as the ruler (ajaw) of the Mayan...In 379, Yax Nuun Ahiin I (depicted) took the throne as the ruler (ajaw) of the Mayan city of Tikal.WikipediaDetails →Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Hebcal, computedDetails →Gahambar Paitishahem (harvest)The third Gahambar, the grain harvest, in the Fasli calendar.avesta.org Zoroastrian calendars, computedDetails →United Nations Day for South-South CooperationA United Nations international day.United NationsDetails →50th anniversary: Afghan president Nur Muhammad Taraki (pictured) was overthrown and later killed...In 1979, Afghan president Nur Muhammad Taraki (pictured) was overthrown and later killed on the orders of Hafizullah Amin, who succeeded him.WikipediaDetails →Elevation of the Holy Cross (Revised Julian calendar)One of the Twelve Great Feasts, a strict fast day.Orthodox Church in America, computedDetails →Exaltation of the Holy CrossHoly Cross Day: honors the cross, from the dedication of the Church of the Holy Sepulchre in 335.USCCB liturgical year, computedDetails →Orthodox Church New Year (Julian calendar)The Indiction, the start of the church year. September 1 in the Julian calendar.Orthodox Church in America, computedDetails →First quarter moonThe Moon is half lit (waxing).NASA, computedDetails →National Hispanic Heritage MonthNational Hispanic Heritage Month, observed across the US.Library of Congress and partners, computedDetails →75th anniversary: The scene in The Seven Year Itch of Marilyn Monroe standing in a white dress...In 1954, The scene in The Seven Year Itch of Marilyn Monroe standing in a white dress over a subway grate was filmed by Billy Wilder.WikipediaDetails →International Day of DemocracyA United Nations international day.United NationsDetails →50th anniversary: Eight people escaped from East Germany to West Germany in a home-made hot air...In 1979, Eight people escaped from East Germany to West Germany in a home-made hot air balloon.WikipediaDetails →Independence Day (Mexico)MexicoA public holiday in Mexico, known locally as Día de la Independencia.Nager.DateDetails →International Day for Interventional CardiologyA United Nations international day.United NationsDetails →International Day for the Preservation of the Ozone LayerA United Nations international day.United NationsDetails →International Day of Science, Technology and Innovation for the SouthA United Nations international day.United NationsDetails →Respect for the Aged Day (Japan)JapanA public holiday in Japan.Nager.DateDetails →World Patient Safety DayA United Nations international day.United NationsDetails →National holiday (Chile)ChileA public holiday in Chile, known locally as Fiestas Patrias.Nager.DateDetails →150th anniversary: The Blackpool Illuminations (example pictured) in the English seaside town of...In 1879, The Blackpool Illuminations (example pictured) in the English seaside town of Blackpool were switched on for the first time.WikipediaDetails →International Equal Pay DayA United Nations international day.United NationsDetails →Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Tue, September 18, 2029.Hebcal, computedDetails →Army Day (Chile)ChileA public holiday in Chile, known locally as Día de las Glorias del Ejército.Nager.DateDetails →Autumn HiganThe week of the equinox, when Japanese Buddhists visit and tidy family graves.Wikipedia, computedDetails →World Cleanup DayA United Nations international day.United NationsDetails →Microsoft retires Azure IoT CentralMicrosoftAzure IoT Central ends support for this service.MicrosoftDetails →Shinzo Abe, born 1954 (75 years)Japanese lawyer and politician, 90th Prime Minister of Japan (died 2022).WikipediaDetails →International Day of PeaceA United Nations international day.United NationsDetails →Chuseok (South Korea)South KoreaA public holiday in South Korea.Nager.DateDetails →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 →25th anniversary: American rock band Green Day released their seventh studio album, American IdiotIn 2004, American rock band Green Day released their seventh studio album, American Idiot.WikipediaDetails →Full moon: Harvest MoonTraditional North American name: Harvest Moon. Moon 402,356 km from Earth.NASA, computedDetails →September equinoxAutumn begins in the Northern Hemisphere, spring in the Southern.US Naval Observatory, 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 →MabonAutumn equinox sabbat. Northern Hemisphere dates.Wheel of the Year, computedDetails →50th anniversary: An American Vela satellite detected an unidentified flash of light near the...In 1979, An American Vela satellite detected an unidentified flash of light near the Prince Edward Islands in the Indian Ocean, thought to be a nuclear weapons...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 →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 →Autumnal Equinox Day (Japan)JapanA public holiday in Japan.Nager.DateDetails →Bruce Springsteen, born 1949 (80 years)American singer-songwriter and guitarist.WikipediaDetails →International Day of Sign LanguagesA United Nations international day.United NationsDetails →SukkotThe Festival of Booths. Begins at sundown on Sun, September 23, 2029.Hebcal, computedDetails →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 →Heritage Day (South Africa)South AfricaA public holiday in South Africa.Nager.DateDetails →World Maritime DayA United Nations international day.United NationsDetails →Pedro Almodóvar, born 1949 (80 years)Spanish director, producer, and screenwriter.WikipediaDetails →2075th anniversary: Julius Caesar dedicated the Temple of Venus Genetrix in Rome to Venus, the...In 46 BC, Julius Caesar dedicated the Temple of Venus Genetrix in Rome to Venus, the mythical ancestor of his family.WikipediaDetails →International Day for the Total Elimination of Nuclear WeaponsA United Nations international day.United NationsDetails →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 →Meskel (Orthodox) (Ethiopia)EthiopiaA public holiday in Ethiopia.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 →175th anniversary: The paddle steamer SS Arctic sank after a collision with SS Vesta 50 miles (80...In 1854, The paddle steamer SS Arctic sank after a collision with SS Vesta 50 miles (80 km) off the coast of Newfoundland, killing approximately 320 people.WikipediaDetails →World Tourism DayA United Nations international day.United NationsDetails →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 →
| Date | Event | |||
|---|---|---|---|---|
| Coming upMay 2029 | ||||
| May 21Monin 2 years | 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 1 · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) |
| Coming upAugust 2029 | ||||
| Aug 10Friin 2 years | Ghost MonthThe seventh lunar month, when the gates of the underworld open; the Ghost Festival falls on its 15th day. Day 1 of lunar month 7.Religion · Taoism and Chinese folk religion · to Sep 7 · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) |
| Aug 23Thuin 2 years | Minnesota State Fair 2029The Great Minnesota Get-Together: twelve days ending on Labor Day.Culture · Minnesota · to Sep 3 · State Fairgrounds, Falcon Heights · Minnesota State Fair | State Fairgrounds, Falcon Heights | annual | Minnesota State FairComputed (rule) |
| Coming upSeptember 2029 | ||||
| Sep 1Satin 2 years | Krishna JanmashtamiTentativeThe birth of Krishna, celebrated at midnight. Shravana, Krishna 8. Regional dates can differ by a day.Religion · Hinduism · Wikipedia | – | annual | WikipediaComputed (rule) |
| 425th anniversary: The Guru Granth Sahib (folio depicted), the religious text of Sikhism, was...In 1604, The Guru Granth Sahib (folio depicted), the religious text of Sikhism, was installed in the Golden Temple in Amritsar.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Leil SelichotThe first night of Ashkenazi penitential prayers (Selichot) before Rosh Hashanah, late on Saturday night.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) | |
| 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) | |
| 225th anniversary: German astronomer Karl Ludwig Harding discovered one of the largest main-belt...In 1804, German astronomer Karl Ludwig Harding discovered one of the largest main-belt asteroids, naming it Juno after the Roman goddess.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Sep 2Sunin 2 years | National Day (Vietnam)A public holiday in Vietnam, known locally as Quốc khánh.Holidays · Vietnam · Vietnam · Nager.Date | Vietnam | annual | Nager.Date |
| Sep 3Monin 2 years | Labor DayA public holiday in the United States, officially Labor Day.Holidays · United States · United States · Nager.Date | United States | annual | Nager.Date |
| 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 | |
| Sep 4Tuein 2 years | 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 11 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Sep 5Wedin 2 years | 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 7Friin 2 years | Independence Day (Brazil)A public holiday in Brazil, known locally as Dia da Independência.Holidays · Brazil · Brazil · Nager.Date | Brazil | annual | Nager.Date |
| 25th anniversary: Hurricane Ivan made landfall on Grenada, devastating at least 85 per cent of...In 2004, Hurricane Ivan made landfall on Grenada, devastating at least 85 per cent of buildings on the island.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 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 | |
| AWS retires emr-spark-8.1 [LTS]UnverifiedAmazon EMR ends support for this runtime.Tech · Retirements · AWS · AWS | AWS | one-off | AWS | |
| Sep 8Satin 2 years | New moonThe Moon is between Earth and the Sun; darkest nights for stargazing.Sky · Moon phases · 5:44 am CT · NASA | – | monthly | NASAComputed (rule) |
| International Literacy DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| 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) | |
| 75th anniversary: Eight nations signed a collective-defense treaty in Manila to create the...In 1954, Eight nations signed a collective-defense treaty in Manila to create the Southeast Asia Treaty Organization (flag pictured), modelled on NATO.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Sep 9Sunin 2 years | 75th anniversary: A magnitude-6.7 earthquake struck near ChlefIn 1954, A magnitude-6.7 earthquake struck near Chlef, killing over 1,200 people and forcing the Algerian government to implement comprehensive reforms in...History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| Susilo Bambang Yudhoyono, born 1949 (80 years)Indonesian general and politician, 6th President of Indonesia.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 | |
| National Grandparents DayThe first Sunday after Labor Day.Observances · Days · US Code | – | annual | US CodeComputed (rule) | |
| Sep 10Monin 2 years | Rosh HashanahThe Jewish New Year. Begins at sundown on Sun, September 9, 2029.Religion · Judaism · to Sep 11 · Hebcal | – | annual | HebcalComputed (rule) |
| 250th anniversary: American Revolutionary War: Captain William Pickles of the Continental Navy...In 1779, American Revolutionary War: Captain William Pickles of the Continental Navy boarded and captured the British sloop HMS West Florida at the Battle of...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Days of Awe (Ten Days of Repentance)The ten days from Rosh Hashanah to Yom Kippur. Begins at sundown on Sun, September 9, 2029.Religion · Judaism · to Sep 19 · Hebcal | – | annual | HebcalComputed (rule) | |
| Peru AI Law and Regulation: Private sector: all other usesTentativeObligations apply four years after publication.Tech · Compliance deadlines · Peru · Regulations | Peru | one-off | Regulations | |
| Sep 11Tuein 2 years | 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 21 · Wikipedia | – | annual | WikipediaComputed (rule) |
| Enkutatash and Nayrouz (Ethiopian and Coptic New Year)Meskerem 1 (Thout 1): the Ethiopian year 2022 and the Coptic year of the Martyrs 1746 begin.Religion · Oriental Orthodox (Coptic, Ethiopian, Armenian) · Ethiopian Orthodox Tewahedo Church | – | annual | Ethiopian Orthodox Tewahedo ChurchComputed (rule) | |
| Enkutatash (Ethiopia)A public holiday in Ethiopia.Holidays · Ethiopia · Ethiopia · Nager.Date | Ethiopia | annual | Nager.Date | |
| Sep 12Wedin 2 years | 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 21 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 1650th anniversary: Yax Nuun Ahiin I (depicted) took the throne as the ruler (ajaw) of the Mayan...In 379, Yax Nuun Ahiin I (depicted) took the throne as the ruler (ajaw) of the Mayan city of Tikal.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Fast of GedaliahA minor fast day after Rosh Hashanah. Observed from dawn to nightfall.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) | |
| 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) | |
| United Nations Day for South-South CooperationA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 14Friin 2 years | 50th anniversary: Afghan president Nur Muhammad Taraki (pictured) was overthrown and later killed...In 1979, Afghan president Nur Muhammad Taraki (pictured) was overthrown and later killed on the orders of Hafizullah Amin, who succeeded him.History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| Elevation of the Holy Cross (Revised Julian calendar)One of the Twelve Great Feasts, a strict fast day.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| Exaltation of the Holy CrossHoly Cross Day: honors the cross, from the dedication of the Church of the Holy Sepulchre in 335.Religion · Christianity · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| Orthodox Church New Year (Julian calendar)The Indiction, the start of the church year. September 1 in the Julian calendar.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| First quarter moonThe Moon is half lit (waxing).Sky · Moon phases · 8:29 pm CT · NASA | – | monthly | NASAComputed (rule) | |
| Sep 15Satin 2 years | 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) |
| 75th anniversary: The scene in The Seven Year Itch of Marilyn Monroe standing in a white dress...In 1954, The scene in The Seven Year Itch of Marilyn Monroe standing in a white dress over a subway grate was filmed by Billy Wilder.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of DemocracyA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 16Sunin 2 years | 50th anniversary: Eight people escaped from East Germany to West Germany in a home-made hot air...In 1979, Eight people escaped from East Germany to West Germany in a home-made hot air balloon.History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| Independence Day (Mexico)A public holiday in Mexico, known locally as Día de la Independencia.Holidays · Mexico · Mexico · Nager.Date | Mexico | annual | Nager.Date | |
| International Day for Interventional CardiologyA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| International Day for the Preservation of the Ozone LayerA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| International Day of Science, Technology and Innovation for the SouthA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 17Monin 2 years | Respect for the Aged Day (Japan)A public holiday in Japan.Holidays · Japan · Japan · Nager.Date | Japan | annual | Nager.Date |
| World Patient Safety DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 18Tuein 2 years | National holiday (Chile)A public holiday in Chile, known locally as Fiestas Patrias.Holidays · Chile · Chile · Nager.Date | Chile | annual | Nager.Date |
| 150th anniversary: The Blackpool Illuminations (example pictured) in the English seaside town of...In 1879, The Blackpool Illuminations (example pictured) in the English seaside town of Blackpool were switched on for the first time.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Equal Pay DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 19Wedin 2 years | Yom KippurThe Day of Atonement, the holiest day of the Jewish year; a 25-hour fast. Begins at sundown on Tue, September 18, 2029.Religion · Judaism · Hebcal | – | annual | HebcalComputed (rule) |
| 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 | |
| Sep 20Thuin 2 years | Autumn HiganThe week of the equinox, when Japanese Buddhists visit and tidy family graves.Religion · Buddhism · to Sep 26 · Wikipedia | – | annual | WikipediaComputed (rule) |
| World Cleanup DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Microsoft retires Azure IoT CentralUnverifiedAzure IoT Central ends support for this service.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Sep 21Friin 2 years | Shinzo Abe, born 1954 (75 years)Japanese lawyer and politician, 90th Prime Minister of Japan (died 2022).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| International Day of PeaceA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Chuseok (South Korea)A public holiday in South Korea.Holidays · South Korea · South Korea · Nager.Date | South Korea | annual | Nager.Date | |
| 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) | |
| 25th anniversary: American rock band Green Day released their seventh studio album, American IdiotIn 2004, American rock band Green Day released their seventh studio album, American Idiot.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Sep 22Satin 2 years | Full moon: Harvest MoonTraditional North American name: Harvest Moon. Moon 402,356 km from Earth.Sky · Moon phases · 11:29 am CT · NASA | – | monthly | NASAComputed (rule) |
| September equinoxAutumn begins in the Northern Hemisphere, spring in the Southern.Sky · Solstices and equinoxes · 12:37 pm CT · US Naval Observatory | – | annual | US Naval ObservatoryComputed (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) | |
| MabonAutumn equinox sabbat. Northern Hemisphere dates.Religion · Pagan and Wiccan · Wheel of the Year | – | annual | Wheel of the YearComputed (rule) | |
| 50th anniversary: An American Vela satellite detected an unidentified flash of light near the...In 1979, An American Vela satellite detected an unidentified flash of light near the Prince Edward Islands in the Indian Ocean, thought to be a nuclear weapons...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 | |
| 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) | |
| 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) | |
| Sep 23Sunin 2 years | Autumnal Equinox Day (Japan)A public holiday in Japan.Holidays · Japan · Japan · Nager.Date | Japan | annual | Nager.Date |
| Bruce Springsteen, born 1949 (80 years)American singer-songwriter and guitarist.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of Sign LanguagesA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 24Monin 2 years | SukkotThe Festival of Booths. Begins at sundown on Sun, September 23, 2029.Religion · Judaism · to Sep 30 · Hebcal | – | annual | HebcalComputed (rule) |
| 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 | |
| Heritage Day (South Africa)A public holiday in South Africa.Holidays · South Africa · South Africa · Nager.Date | South Africa | annual | Nager.Date | |
| World Maritime DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 25Tuein 2 years | Pedro Almodóvar, born 1949 (80 years)Spanish director, producer, and screenwriter.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia |
| Sep 26Wedin 2 years | 2075th anniversary: Julius Caesar dedicated the Temple of Venus Genetrix in Rome to Venus, the...In 46 BC, Julius Caesar dedicated the Temple of Venus Genetrix in Rome to Venus, the mythical ancestor of his family.History · 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 | |
| Sep 27Thuin 2 years | 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) |
| Meskel (Orthodox) (Ethiopia)A public holiday in Ethiopia.Holidays · Ethiopia · Ethiopia · Nager.Date | Ethiopia | 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) | |
| 175th anniversary: The paddle steamer SS Arctic sank after a collision with SS Vesta 50 miles (80...In 1854, The paddle steamer SS Arctic sank after a collision with SS Vesta 50 miles (80 km) off the coast of Newfoundland, killing approximately 320 people.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Tourism DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Sep 28Friin 2 years | 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 | |