September 2025 calendar
Holidays, religious days, the sky, sports, elections and more, with sources.
September 2025
116 events
| Date | Event | When | |||
|---|---|---|---|---|---|
| Aug 21Thu | Minnesota State Fair 2025Culture · Minnesota · to Sep 1 · State Fairgrounds, Falcon Heights | State Fairgrounds, Falcon Heights | annual | Minnesota State FairComputed (rule) | 13 mo ago |
| Aug 23Sat | 2025 Vuelta a EspañaSports · Cycling · to Sep 14 · Spain | Spain | annual | Wikipedia | 13 mo ago |
| Aug 24Sun | 2025 US Open (tennis)Sports · Tennis · to Sep 7 · USTA Billie Jean King National Tennis Center, New York | USTA Billie Jean King National Tennis Center, New York | annual | Wikipedia | 13 mo ago |
| Aug 27Wed | Ganesh ChaturthiTentativeReligion · Hinduism · to Sep 6 | – | annual | WikipediaComputed (rule) | 13 mo ago |
| 82nd Venice International Film FestivalCulture · Film festivals · to Sep 6 · Venice Lido | Venice Lido | annual | Wikipedia | 13 mo ago | |
| Sep 1Mon | Labor DayHolidays · United States · United States | United States | annual | Nager.Date | 13 mo ago |
| Labor Day (Canada)Holidays · Canada · Canada | Canada | annual | Nager.Date | 13 mo ago | |
| 25th anniversary: Speakers' Corner, a free speech area in Hong Lim Park in Singapore, was launchedHistory · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Edgar Rice Burroughs, born 1875 (150 years)People · Birth anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Sep 3Wed | 375th anniversary: Under Oliver Cromwell, the English New Model Army ambushed a poorly prepared...History · Anniversaries | – | annual | Wikipedia | 13 mo ago |
| Charlie Sheen, born 1965 (60 years)People · Birth anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Salesforce earnings (Q2 FY2026)Economy · Earnings | Salesforce (CRM) | quarterly | Quarterly | 13 mo ago | |
| Sep 4Thu | NFL season kickoff 2025Sports · NFL · Lincoln Financial Field, Philadelphia | Lincoln Financial Field, Philadelphia | annual | Wikipedia | 13 mo ago |
| Mawlid an-NabiTentativeReligion · Islam | – | annual | Umm al-Qura calendarComputed (rule) | 13 mo ago | |
| Prophet Muhammad's Birthday (Egypt)Holidays · Egypt · Egypt | Egypt | annual | Nager.Date | 13 mo ago | |
| 225th anniversary: French Revolutionary Wars: Facing starvation and a death rate of 100 soldiers...History · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| 2025 Toronto International Film FestivalCulture · Film festivals · to Sep 14 · Toronto | Toronto | annual | Wikipedia | 13 mo ago | |
| Broadcom earnings (Q3 FY2025)Economy · Earnings | Broadcom (AVGO) | quarterly | Quarterly | 13 mo ago | |
| Sep 5Fri | 50th anniversary: Squeaky Fromme (pictured), a devotee of Charles Manson, attempted to...History · Anniversaries | – | annual | Wikipedia | 13 mo ago |
| International Day of CharityObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| International Day of the World’s Indigenous Women and GirlsObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| Sep 6Sat | Ghost Festival (Zhongyuan)Religion · Buddhism | – | annual | Hong Kong ObservatoryComputed (rule) | 13 mo ago |
| 25th anniversary: The Los Angeles Dodgers hosted the first Pride Night in Major League Baseball...History · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Sep 7Sun | Full moon: Corn MoonSky · Moon phases · 1:09 pm CT | – | monthly | NASAComputed (rule) | 13 mo ago |
| Total lunar eclipseSky · Eclipses · 1:11 pm CT | – | one-off | NASA Eclipse Web SiteComputed (rule) | 13 mo ago | |
| Independence Day (Brazil)Holidays · Brazil · Brazil | Brazil | annual | Nager.Date | 13 mo ago | |
| International Day of Clean Air for Blue SkiesObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| International Day of Police CooperationObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| National Grandparents DayObservances · Days | – | annual | US CodeComputed (rule) | 13 mo ago | |
| World Duchenne Awareness DayObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| Sep 8Mon | Minnesota Vikings 2025 season openerSports · Minnesota teams · Soldier Field, Chicago | Soldier Field, Chicago | annual | Wikipedia | 13 mo ago |
| 250th anniversary: Maltese priests discontented with the Order of Saint John led an uprising that...History · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| 925th anniversary: Theodoric was elected by opponents of Pope Paschal II, following the death of...History · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| International Literacy DayObservances · UN international days | – | annual | United Nations | 13 mo ago | |
| 2025 Norwegian parliamentary electionPolitics · Elections worldwide · Norway | Norway | every few years | Wikipedia | 13 mo ago | |
| 125th anniversary: The Great Galveston hurricane, the deadliest natural disaster in U.S. history,...History · Anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Peter Sellers, born 1925 (100 years)People · Birth anniversaries | – | annual | Wikipedia | 13 mo ago | |
| Sep 9Tue | International Day to Protect Education from AttackObservances · UN international days | – | annual | United Nations | 12 mo ago |
| Oracle earnings (Q1 FY2026)Economy · Earnings | Oracle (ORCL) | quarterly | Quarterly | 12 mo ago | |
| Sep 10Wed | 25th anniversary: British forces freed soldiers and civilians who had been held captive by the...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| Sep 11Thu | 250th anniversary: American Revolutionary War: Benedict Arnold's expedition departed from...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| Bashar al-Assad, born 1965 (60 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Franz Beckenbauer, born 1945 (80 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Adobe earnings (Q3 FY2025)Economy · Earnings | Adobe (ADBE) | quarterly | Quarterly | 12 mo ago | |
| Sep 12Fri | United Nations Day for South-South CooperationObservances · UN international days | – | annual | United Nations | 12 mo ago |
| Sep 13Sat | 2025 World Athletics ChampionshipsSports · Marathons and athletics · to Sep 21 · Tokyo | Tokyo | every few years | Wikipedia | 12 mo ago |
| Sep 14Sun | Pope Leo XIV, born 1955 (70 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago |
| 77th Primetime Emmy AwardsCulture · Awards · Peacock Theater, Los Angeles | Peacock Theater, Los Angeles | annual | Wikipedia | 12 mo ago | |
| Last quarter moonSky · Moon phases · 5:33 am CT | – | monthly | NASAComputed (rule) | 12 mo ago | |
| Sep 15Mon | National Hispanic Heritage MonthObservances · Heritage months · to Oct 15 | – | annual | Library of Congress and partnersComputed (rule) | 12 mo ago |
| Microsoft Ignite 2025Data and AI · Conferences · Seattle, WA | Seattle, WA; Microsoft | annual | Microsoft | 12 mo ago | |
| Respect for the Aged Day (Japan)Holidays · Japan · Japan | Japan | annual | Nager.Date | 12 mo ago | |
| International Day of DemocracyObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 16Tue | FOMC meetingEconomy · Federal Reserve · 1:00 pm ET · to Sep 17 · Federal Reserve, Washington | Federal Reserve, Washington | eight times a year | Federal Reserve | 12 mo ago |
| 50th anniversary: The prototype of the Soviet Mikoyan MiG-31, one of the fastest combat jets in...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Independence Day (Mexico)Holidays · Mexico · Mexico | Mexico | annual | Nager.Date | 12 mo ago | |
| B. B. King, born 1925 (100 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| International Day for Interventional CardiologyObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| International Day for the Preservation of the Ozone LayerObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| International Day of Science, Technology and Innovation for the SouthObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 17Wed | 250th anniversary: American Revolutionary War: The Continental Army under Richard Montgomery began...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| Narendra Modi, born 1950 (75 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Jimmie Johnson, born 1975 (50 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Pope Paul V, born 1550 (475 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| World Patient Safety DayObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 18Thu | 150th anniversary: The Indianola hurricane dissipated over Mississippi after killing around eight...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| 175th anniversary: The United States Congress passed the Fugitive Slave Act, decreeing that all...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| 75th anniversary: Korean War: The Korean People's Army retreated from the Battle of the Pusan...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| International Equal Pay DayObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 19Fri | 75th anniversary: Korean War: A North Korean attack was repelled by Allied forces at the Battle...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| Sep 20Sat | 25th anniversary: The Real Irish Republican Army carried out a rocket-launcher attack on the MI6...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| World Cleanup DayObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 21Sun | Saturn at oppositionSky · Planets | – | about yearly | Astronomy EngineComputed (rule) | 12 mo ago |
| Partial solar eclipseSky · Eclipses · 2:41 pm CT | – | one-off | NASA Eclipse Web SiteComputed (rule) | 12 mo ago | |
| New moonSky · Moon phases · 2:54 pm CT | – | monthly | NASAComputed (rule) | 12 mo ago | |
| 350th anniversary: Led by Antonio de Vea, a Spanish naval expedition departed El Callao, Peru, for...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| International Day of PeaceObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| 2025 Berlin MarathonSports · Marathons and athletics · Berlin | Berlin | annual | Wikipedia | 12 mo ago | |
| Bill Murray, born 1950 (75 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Sep 22Mon | Sharad NavaratriTentativeReligion · Hinduism · to Sep 30 | – | annual | WikipediaComputed (rule) | 12 mo ago |
| September equinoxSky · Solstices and equinoxes · 1:19 pm CT | – | annual | US Naval ObservatoryComputed (rule) | 12 mo ago | |
| MabonReligion · Pagan and Wiccan | – | annual | Wheel of the YearComputed (rule) | 12 mo ago | |
| 50th anniversary: Sara Jane Moore attempted to assassinate U.S. president Gerald Ford, but failed...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Sep 23Tue | Rosh HashanahReligion · Judaism · to Sep 24 | – | annual | HebcalComputed (rule) | 12 mo ago |
| UN General Assembly general debate 2025Politics · Summits · to Sep 29 · UN Headquarters, New York | UN Headquarters, New York | annual | Wikipedia | 12 mo ago | |
| Autumnal Equinox Day (Japan)Holidays · Japan · Japan | Japan | annual | Nager.Date | 12 mo ago | |
| Neptune at oppositionSky · Planets | – | about yearly | Astronomy EngineComputed (rule) | 12 mo ago | |
| International Day of Sign LanguagesObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Micron earnings (Q4 FY2025)Economy · Earnings | Micron (MU) | quarterly | Quarterly | 12 mo ago | |
| Sep 24Wed | 50th anniversary: Dougal Haston and Doug Scott of the Southwest Face expedition became the first...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| Heritage Day (South Africa)Holidays · South Africa · South Africa | South Africa | annual | Nager.Date | 12 mo ago | |
| 75th anniversary: The "Great Smoke Pall", generated by the Chinchaga fire, the largest recorded...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| World Maritime DayObservances · UN international days | – | annual | United Nations | 12 mo ago | |
| Sep 25Thu | 1750th anniversary: After the assassination of Aurelian, Tacitus (depicted) was chosen by the...History · Anniversaries | – | annual | Wikipedia | 12 mo ago |
| 250th anniversary: American Revolutionary War: Ethan Allen and a small force of American and...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Meta Connect 2025Data and AI · Conferences · to Sep 26 · Menlo Park, CA | Menlo Park, CA; Meta Platforms, Inc. | annual | Meta Platforms, Inc. | 12 mo ago | |
| Fast of GedaliahReligion · Judaism | – | annual | HebcalComputed (rule) | 12 mo ago | |
| 225th anniversary: French Revolutionary Wars: After U.S. ships became involved, French forces...History · Anniversaries | – | annual | Wikipedia | 12 mo ago | |
| Sep 26Fri | 2025 Ryder CupSports · Golf · to Sep 28 · Bethpage Black, New York | Bethpage Black, New York | every few years | Wikipedia | 12 mo ago |
| Petro Poroshenko, born 1965 (60 years)People · Birth anniversaries | – | annual | Wikipedia | 12 mo ago |
Sources: official schedules and published calendars, linked on every event; computed dates name their rule. Refreshed nightly.