Calendarby GlyphApril 2027 calendar
April 2027
Coming upJanuary 2027
Coming upMarch 2027
Great Lent (Coptic and Ethiopian, Abiy Tsom)The 55-day fast of the Coptic and Ethiopian churches, ending at Easter.Ethiopian Orthodox Tewahedo Church, computedDetails →Great Lent (Orthodox)The forty days of the Orthodox fast, from Clean Monday to the Friday before Lazarus Saturday; Holy Week follows.Orthodox Church in America, computedDetails →Easter seasonThe fifty days from Easter Sunday to Pentecost (Eastertide).USCCB liturgical year, computedDetails →Nutanix .NEXT 2027Las Vegas, NV · NutanixNutanix's annual conference on hybrid multicloud infrastructure.NutanixDetails →OAI 2027Atlanta, GA · OAIThis is a practitioner-first conference for engineers who deploy AI and leaders who fund it, focusing on reliable AI deployment and measurable value.OAIDetails →Voxxed Days Amsterdam 2027Amsterdam, Netherlands · IndependentA two-day tech conference in Amsterdam, Netherlands.IndependentDetails →
Coming upApril 2027
Maryland Online Data Privacy Act (MODPA): Discretionary 60-day cure period endsMarylandThe Division's discretionary notice-and-cure (at least 60 days) applies only to violations occurring on or before April 1, 2027 (Com. Law 14-4614). Not...RegulationsDetails →75th anniversary: Israel enacted a citizenship law, prior to which the country technically had no...In 1952, Israel enacted a citizenship law, prior to which the country technically had no citizens.WikipediaDetails →Ferenc Puskás, born 1927 (100 years)Hungarian footballer and manager (died 2006).WikipediaDetails →April Fools’ DayA day for pranks.Wikipedia, computedDetails →Berkeley SkyDeck Batch 23 demo dayBerkeley, CA · Berkeley SkyDeckBerkeley SkyDeck Batch 23 founders present to investors. Month only: the program names April 2027, not the day.Berkeley SkyDeckDetails →CFPB Open Banking Rule (Section 1033): Tier 2 compliance date (original)United StatesBanks with $10B to $250B in assets and smaller nondepositories. Original date in 12 CFR 1033.121; subject to the 90-day stay, planned extension and...RegulationsDetails →EF London Program Spring 2027 batch startsLondon · Entrepreneur FirstEF London Program Spring 2027 begins. Month only: the program names April 2027, not the day.Entrepreneur FirstDetails →Google Cloud retires Go 1.25Google CloudCloud Run functions ends support for this runtime.Google CloudDetails →Google Cloud retires multimodalembedding@001Google CloudGemini Enterprise Agent Platform (Vertex AI) ends support for this model.Google CloudDetails →Google Cloud retires text-embedding-004Google CloudGemini Enterprise Agent Platform (Vertex AI) ends support for this model.Google CloudDetails →Google Cloud retires text-embedding-005Google CloudGemini Enterprise Agent Platform (Vertex AI) ends support for this model.Google CloudDetails →Google Cloud retires text-multilingual-embedding-002Google CloudGemini Enterprise Agent Platform (Vertex AI) ends support for this model.Google CloudDetails →Google for Startups Accelerator: Africa 2027 batch startsAfrica · Google for Startups AcceleratorGoogle for Startups Accelerator: Africa 2027 begins. Estimated for April 2027, not announced yet.Google for Startups AcceleratorDetails →Google for Startups Accelerator: India: AI First 2027 applications closeIndia · Google for Startups AcceleratorLast day to apply to Google for Startups Accelerator: India: AI First 2027. Estimated for April 2027, not announced yet.Google for Startups AcceleratorDetails →Google for Startups Accelerator: Korea 2027 batch startsSouth Korea · Google for Startups AcceleratorGoogle for Startups Accelerator: Korea 2027 begins. Estimated for April 2027, not announced yet.Google for Startups AcceleratorDetails →Microsoft retires Azure AI Content ModeratorMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →MnTech Connect 2027Saint Paul, MN · Minnesota Technology Association (MnTech)This is MnTech's flagship annual tech leadership conference, focusing on AI, talent, and the broader tech ecosystem in Minnesota.Minnesota Technology Association (MnTech)Details →OpenAI retires gpt-5.1OpenAIOpenAI API ends support for this model; the replacement is gpt-6-sol.OpenAIDetails →OpenAI retires gpt-5.3-codexOpenAIOpenAI API ends support for this model; the replacement is gpt-6-sol.OpenAIDetails →OpenAI retires gpt-5.4-nanoOpenAIOpenAI API ends support for this model; the replacement is gpt-6-luna.OpenAIDetails →Redis retires Redis 6.2RedisRedis ends support for this runtime.RedisDetails →SCaLE 2027Pasadena, Los Angeles, CA · IndependentA four-day tech conference in Pasadena, Los Angeles, CA.IndependentDetails →SCaLE 24x 2027Pasadena, Los Angeles, CA · Southern California Linux ExpoA four-day tech conference in Pasadena, Los Angeles, CA.Southern California Linux ExpoDetails →SunSecCon 2027Pasadena, Los Angeles, CA · IndependentA two-day tech conference in Pasadena, Los Angeles, CA.IndependentDetails →2027 Women's Final FourNationwide Arena, Columbus, OhioThe women's national semifinals.WikipediaDetails →GDPR: GDPR Procedural Regulation appliesEuropean UnionHarmonised rules for cross-border complaint admissibility, rights to be heard and access to preliminary findings, and investigation timelines apply to DPAs...RegulationsDetails →Day of the Veterans and Fallen of the Malvinas War (Argentina)ArgentinaA public holiday in Argentina, known locally as Día del Veterano y de los Caídos en la Guerra de Malvinas.Nager.DateDetails →25th anniversary: Second Intifada: Palestinian militants sought refuge from advancing Israeli...In 2002, Second Intifada: Palestinian militants sought refuge from advancing Israeli forces in the Church of the Nativity in Bethlehem, beginning a month-long...WikipediaDetails →World Autism Awareness DayA United Nations international day.United NationsDetails →DevOpsDays Los Angeles 2027Pasadena, Los Angeles, CA · DevOpsDays Los AngelesA community-organized conference focusing on the human side of technology delivery, covering DevOps practices, culture, and collaboration.DevOpsDays Los AngelesDetails →Microsoft retires claude-mythos-preview (gated research preview)MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →2027 Men's Final FourFord Field, DetroitNational semifinals and the championship game.WikipediaDetails →2027 Texas spring turkey season (North Zone)TexasSpring Rio Grande turkey season in the North Zone; the South Zone runs Mar. 20 to May 2, 2027.Texas Parks and WildlifeDetails →2027 NCAA women's basketball championship gameNationwide Arena, Columbus, OhioThe women's national championship game.WikipediaDetails →2027 Australian Grand PrixAlbert Park Circuit, MelbourneFormula One Australian Grand Prix race day.WikipediaDetails →Divine Mercy SundayThe Second Sunday of Easter.USCCB liturgical year, computedDetails →International Day for Mine Awareness and Assistance in Mine ActionA United Nations international day.United NationsDetails →Deep Dish Swift 2027Chicago, IL · Josh & Kari HoltzThis is a Swift and Apple developer conference covering Swift, iOS, macOS, indie dev, design, and tooling.Josh & Kari HoltzDetails →Google Cloud retires Python 3.10Google CloudCloud Run functions ends support for this runtime.Google CloudDetails →2027 NCAA men's basketball championship gameFord Field, DetroitThe men's national championship game.WikipediaDetails →Qingming Festival (Tomb-Sweeping Day)Families visit and sweep ancestors’ graves; the solar term when the Sun reaches 15° ecliptic longitude.Hong Kong Observatory, computedDetails →Ching Ming Festival (Hong Kong)Hong KongA public holiday in Hong Kong.Nager.DateDetails →AnnunciationThe angel Gabriel’s announcement to Mary (Lady Day). Moved from March 25 this year (Holy Week, the Easter octave or a Sunday).USCCB liturgical year, computedDetails →125th anniversary: A spectator stand collapsed during a football match at Ibrox Park in Govan, ScotlandIn 1902, A spectator stand collapsed during a football match at Ibrox Park in Govan, Scotland, killing 25 supporters and injuring more than 500 others.WikipediaDetails →25th anniversary: In the first reported data breach, 250,000 social security numbers collected by...In 2002, In the first reported data breach, 250,000 social security numbers collected by the State of California were stolen from a data center.WikipediaDetails →Gloria Macapagal Arroyo, born 1947 (80 years)Filipino academic and politician, 14th President of the Philippines.WikipediaDetails →Joseph Lister, born 1827 (200 years)English surgeon and academic (died 1912).WikipediaDetails →International Day of ConscienceA United Nations international day.United NationsDetails →RSAC 2027 ConferenceSan Francisco, SF Bay Area, CA · RSACMajor cybersecurity conference and expo.RSACDetails →New moonThe Moon is between Earth and the Sun; darkest nights for stargazing.NASA, computedDetails →375th anniversary: Dutch sailor Jan van Riebeeck landed at Table Bay in southern Africa,...In 1652, Dutch sailor Jan van Riebeeck landed at Table Bay in southern Africa, establishing a settlement that later became known as Cape Town.WikipediaDetails →2027 Wisconsin Supreme Court electionWisconsinStatewide election for a seat on the Wisconsin Supreme Court.WikipediaDetails →International Day of Sport for Development and PeaceA United Nations international day.United NationsDetails →Cyber Risk & Insurance Innovation USA 2027Chicago, IL · Newton.MediaThis event brings together senior cyber insurance and risk leaders to explore issues shaping the market, from AI and systemic risk to underwriting,...Newton.MediaDetails →Microsoft retires claude-opus-4-7 (1)MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →Microsoft retires grok-4-20-non-reasoning (1)MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →Microsoft retires grok-4-20-reasoning (1)MicrosoftMicrosoft Foundry ends support for this model.MicrosoftDetails →Ugadi and Gudi PadwaThe Hindu lunar new year: Ugadi in Karnataka, Andhra Pradesh and Telangana, Gudi Padwa in Maharashtra, Cheti Chand for Sindhis. Chaitra, Shukla 1. Regional...Wikipedia, computedDetails →World Health DayA United Nations international day.United NationsDetails →Karume Day (Tanzania)TanzaniaA public holiday in Tanzania, known locally as Siku ya Karume.Nager.DateDetails →Annunciation of the Theotokos (Julian calendar)One of the Twelve Great Feasts; kept even in Holy Week. March 25 in the Julian calendar.Orthodox Church in America, computedDetails →Chaitra NavratriThe spring Navratri, nine nights of the goddess ending at Ram Navami. Chaitra, Shukla 1. Regional dates can differ by a day.Wikipedia, computedDetails →Pope Clement XII, born 1652 (375 years)Pope Clement XII (died 1740).WikipediaDetails →International Day of Reflection on the 1994 Genocide against the Tutsi in RwandaA United Nations international day.United NationsDetails →BSides Prague 2027Prague, Czech Republic · IndependentA two-day tech conference in Prague, Czech Republic.IndependentDetails →TECHSPO Los Angeles 2027Los Angeles, CA · TECHSPO Technology Expo Global SeriesA technology expo covering AI, SaaS, AdTech, and MarTech for marketing, technology, and innovation professionals.TECHSPO Technology Expo Global SeriesDetails →Hanamatsuri (Buddha’s Birthday in Japan)Flower festival: sweet tea is poured over a statue of the infant Buddha.Wikipedia, computedDetails →April 2027 LSATUS test centersLSAT primary test dates.LSACDetails →AWS retires Claude Sonnet 4.5AWSAmazon Bedrock ends support for this model.AWSDetails →Day of Valor (Philippines)PhilippinesA public holiday in the Philippines, known locally as Araw ng Kagitingan.Nager.DateDetails →Coachella 2027, weekend oneEmpire Polo Club, Indio, CaliforniaFirst weekend of the Coachella Valley Music and Arts Festival; the second runs April 16 to 18.CoachellaDetails →Stream trout season opens (MN)Statewide inland streamsStream trout, Statewide inland streams.Minnesota DNRDetails →Steven Seagal, born 1952 (75 years)American actor, producer, and martial artist.WikipediaDetails →ACT national test dateUS test centersNational ACT test date.ACTDetails →2027 Gambian parliamentary electionGambiaGambia votes: Parliament.WikipediaDetails →2027 Japanese Grand PrixSuzuka Circuit, SuzukaFormula One Japanese Grand Prix race day.WikipediaDetails →25th anniversary: In a coup attempt, members of the Venezuelan military detained President Hugo...In 2002, In a coup attempt, members of the Venezuelan military detained President Hugo Chávez and demanded his resignation.WikipediaDetails →Google Cloud retires Google Kubernetes Engine 1.35Google CloudGoogle Kubernetes Engine ends support for this runtime.Google CloudDetails →1400th anniversary: King Edwin of Northumbria was baptised by Bishop Paulinus of YorkIn 627, King Edwin of Northumbria was baptised by Bishop Paulinus of York.WikipediaDetails →International Day of Human Space FlightA United Nations international day.United NationsDetails →2027 ITS America Conference & ExpoSalt Lake City, UT · ITS America Events with ITS AmericaA conference reimagining transportation through technology, discussing AI, digital infrastructure, V2X, automated vehicles, and multimodal mobility.ITS America Events with ITS AmericaDetails →SREcon27 AmericasSeattle, WA · USENIXA three-day tech conference in Seattle, WA.USENIXDetails →Songkran (Thai New Year)The Theravada new year of Thailand, with Pi Mai in Laos, Thingyan in Myanmar and Choul Chnam Thmey in Cambodia: temple visits, merit-making and water throwing.Wikipedia, computedDetails →2027 NBA play-in tournamentSeeds 7 to 10 in each conference play for the last playoff spots.WikipediaDetails →250th anniversary: American Revolutionary War: British and Hessian forces conducted a surprise...In 1777, American Revolutionary War: British and Hessian forces conducted a surprise attack against a Continental Army outpost at Bound Brook, New Jersey.WikipediaDetails →Analytics and Data Summit 2027Redwood Shores, CA · OracleThis summit brings together Oracle data and analytics professionals to explore trends and innovations in data analytics, AI, and machine learning.OracleDetails →Google Cloud Next 2027Las Vegas, NV · GoogleGoogle Cloud's flagship conference on cloud infrastructure, data and AI.GoogleDetails →First quarter moonThe Moon is half lit (waxing).NASA, computedDetails →Microsoft end of support: Visual Studio 2017Visual Studio 2017 reaches end of support.MicrosoftDetails →Microsoft retires System Center 2022 Data Protection ManagerMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires System Center 2022 Operations ManagerMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires System Center 2022 OrchestratorMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →Microsoft retires System Center 2022 Service ManagerMicrosoftMicrosoft Lifecycle ends support for this product.MicrosoftDetails →
| Date | Event | |||
|---|---|---|---|---|
| Coming upJanuary 2027 | ||||
| Jan 14Thuin 2 months | Kumbh MelaThe largest gathering of people on earth: pilgrims bathe at the confluence of sacred rivers on the auspicious days.Religion · Hinduism · to Apr 20 · Indian Express (Uttarakhand schedule) | – | annual | Indian Express (Uttarakhand schedule) |
| Coming upMarch 2027 | ||||
| Mar 8Monin 3 months | Great Lent (Coptic and Ethiopian, Abiy Tsom)The 55-day fast of the Coptic and Ethiopian churches, ending at Easter.Religion · Oriental Orthodox (Coptic, Ethiopian, Armenian) · to May 1 · Ethiopian Orthodox Tewahedo Church | – | annual | Ethiopian Orthodox Tewahedo ChurchComputed (rule) |
| Mar 15Monin 4 months | Great Lent (Orthodox)The forty days of the Orthodox fast, from Clean Monday to the Friday before Lazarus Saturday; Holy Week follows.Religion · Eastern Orthodox · to Apr 23 · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) |
| Mar 28Sunin 4 months | Easter seasonThe fifty days from Easter Sunday to Pentecost (Eastertide).Religion · Catholic · to May 16 · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) |
| Mar 30Tuein 4 months | Nutanix .NEXT 2027Nutanix's annual conference on hybrid multicloud infrastructure.Tech · Conferences · to Apr 1 · Las Vegas, NV · Nutanix | Las Vegas, NV; Nutanix | annual | Nutanix |
| Mar 31Wedin 4 months | OAI 2027UnverifiedThis is a practitioner-first conference for engineers who deploy AI and leaders who fund it, focusing on reliable AI deployment and measurable value.Tech · Conferences · to Apr 1 · Atlanta, GA · OAI | Atlanta, GA; OAI | annual | OAI |
| Voxxed Days Amsterdam 2027A two-day tech conference in Amsterdam, Netherlands.Tech · Conferences · to Apr 1 · Amsterdam, Netherlands · Independent | Amsterdam, Netherlands; Independent | annual | Independent | |
| Coming upApril 2027 | ||||
| Apr 1Thuin 4 months | Maryland Online Data Privacy Act (MODPA): Discretionary 60-day cure period endsThe Division's discretionary notice-and-cure (at least 60 days) applies only to violations occurring on or before April 1, 2027 (Com. Law 14-4614). Not...Tech · Compliance deadlines · Maryland · Regulations | Maryland | one-off | Regulations |
| 75th anniversary: Israel enacted a citizenship law, prior to which the country technically had no...In 1952, Israel enacted a citizenship law, prior to which the country technically had no citizens.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Ferenc Puskás, born 1927 (100 years)Hungarian footballer and manager (died 2006).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| April Fools’ DayA day for pranks.Observances · Days · Wikipedia | – | annual | WikipediaComputed (rule) | |
| Berkeley SkyDeck Batch 23 demo dayTentativeBerkeley SkyDeck Batch 23 founders present to investors. Month only: the program names April 2027, not the day.Tech · Accelerators · to Apr 30 · Berkeley, CA · Berkeley SkyDeck | Berkeley, CA; Berkeley SkyDeck | – | Berkeley SkyDeck | |
| CFPB Open Banking Rule (Section 1033): Tier 2 compliance date (original)TentativeBanks with $10B to $250B in assets and smaller nondepositories. Original date in 12 CFR 1033.121; subject to the 90-day stay, planned extension and...Tech · Compliance deadlines · United States · Regulations | United States | one-off | Regulations | |
| EF London Program Spring 2027 batch startsTentativeEF London Program Spring 2027 begins. Month only: the program names April 2027, not the day.Tech · Accelerators · to Apr 30 · London · Entrepreneur First | London; Entrepreneur First | – | Entrepreneur First | |
| Google Cloud retires Go 1.25UnverifiedCloud Run functions ends support for this runtime.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Google Cloud retires multimodalembedding@001Gemini Enterprise Agent Platform (Vertex AI) ends support for this model.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Google Cloud retires text-embedding-004Gemini Enterprise Agent Platform (Vertex AI) ends support for this model.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Google Cloud retires text-embedding-005Gemini Enterprise Agent Platform (Vertex AI) ends support for this model.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Google Cloud retires text-multilingual-embedding-002Gemini Enterprise Agent Platform (Vertex AI) ends support for this model.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Google for Startups Accelerator: Africa 2027 batch startsTentativeGoogle for Startups Accelerator: Africa 2027 begins. Estimated for April 2027, not announced yet.Tech · Accelerators · to Apr 30 · Africa · Google for Startups Accelerator | Africa; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Google for Startups Accelerator: India: AI First 2027 applications closeTentativeLast day to apply to Google for Startups Accelerator: India: AI First 2027. Estimated for April 2027, not announced yet.Tech · Accelerators · to Apr 30 · India · Google for Startups Accelerator | India; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Google for Startups Accelerator: Korea 2027 batch startsTentativeGoogle for Startups Accelerator: Korea 2027 begins. Estimated for April 2027, not announced yet.Tech · Accelerators · to Apr 30 · South Korea · Google for Startups Accelerator | South Korea; Google for Startups Accelerator | – | Google for Startups Accelerator | |
| Microsoft retires Azure AI Content ModeratorUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| MnTech Connect 2027UnverifiedThis is MnTech's flagship annual tech leadership conference, focusing on AI, talent, and the broader tech ecosystem in Minnesota.Tech · Conferences · Saint Paul, MN · Minnesota Technology Association (MnTech) | Saint Paul, MN; Minnesota Technology Association (MnTech) | annual | Minnesota Technology Association (MnTech) | |
| OpenAI retires gpt-5.1UnverifiedOpenAI API ends support for this model; the replacement is gpt-6-sol.Tech · Retirements · OpenAI · OpenAI | OpenAI | one-off | OpenAI | |
| OpenAI retires gpt-5.3-codexUnverifiedOpenAI API ends support for this model; the replacement is gpt-6-sol.Tech · Retirements · OpenAI · OpenAI | OpenAI | one-off | OpenAI | |
| OpenAI retires gpt-5.4-nanoUnverifiedOpenAI API ends support for this model; the replacement is gpt-6-luna.Tech · Retirements · OpenAI · OpenAI | OpenAI | one-off | OpenAI | |
| Redis retires Redis 6.2UnverifiedRedis ends support for this runtime.Tech · Retirements · Redis · Redis | Redis | one-off | Redis | |
| SCaLE 2027A four-day tech conference in Pasadena, Los Angeles, CA.Tech · Conferences · to Apr 4 · Pasadena, Los Angeles, CA · Independent | Pasadena, Los Angeles, CA; Independent | annual | Independent | |
| SCaLE 24x 2027A four-day tech conference in Pasadena, Los Angeles, CA.Tech · Conferences · to Apr 4 · Pasadena, Los Angeles, CA · Southern California Linux Expo | Pasadena, Los Angeles, CA; Southern California Linux Expo | annual | Southern California Linux Expo | |
| SunSecCon 2027A two-day tech conference in Pasadena, Los Angeles, CA.Tech · Conferences · to Apr 2 · Pasadena, Los Angeles, CA · Independent | Pasadena, Los Angeles, CA; Independent | annual | Independent | |
| Apr 2Friin 4 months | 2027 Women's Final FourThe women's national semifinals.Sports · NCAA · Nationwide Arena, Columbus, Ohio · Wikipedia | Nationwide Arena, Columbus, Ohio | annual | Wikipedia |
| GDPR: GDPR Procedural Regulation appliesHarmonised rules for cross-border complaint admissibility, rights to be heard and access to preliminary findings, and investigation timelines apply to DPAs...Tech · Compliance deadlines · European Union · Regulations | European Union | one-off | Regulations | |
| Day of the Veterans and Fallen of the Malvinas War (Argentina)A public holiday in Argentina, known locally as Día del Veterano y de los Caídos en la Guerra de Malvinas.Holidays · Argentina · Argentina · Nager.Date | Argentina | annual | Nager.Date | |
| 25th anniversary: Second Intifada: Palestinian militants sought refuge from advancing Israeli...In 2002, Second Intifada: Palestinian militants sought refuge from advancing Israeli forces in the Church of the Nativity in Bethlehem, beginning a month-long...History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| World Autism Awareness DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| DevOpsDays Los Angeles 2027UnverifiedA community-organized conference focusing on the human side of technology delivery, covering DevOps practices, culture, and collaboration.Tech · Conferences · Pasadena, Los Angeles, CA · DevOpsDays Los Angeles | Pasadena, Los Angeles, CA; DevOpsDays Los Angeles | annual | DevOpsDays Los Angeles | |
| Microsoft retires claude-mythos-preview (gated research preview)UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Apr 3Satin 4 months | 2027 Men's Final FourNational semifinals and the championship game.Sports · NCAA · to Apr 5 · Ford Field, Detroit · Wikipedia | Ford Field, Detroit | annual | Wikipedia |
| 2027 Texas spring turkey season (North Zone)Spring Rio Grande turkey season in the North Zone; the South Zone runs Mar. 20 to May 2, 2027.Outdoors · Hunting · to May 16 · Texas · Texas Parks and Wildlife | Texas | annual | Texas Parks and Wildlife | |
| Apr 4Sunin 4 months | 2027 NCAA women's basketball championship gameThe women's national championship game.Sports · NCAA · Nationwide Arena, Columbus, Ohio · Wikipedia | Nationwide Arena, Columbus, Ohio | annual | Wikipedia |
| 2027 Australian Grand PrixFormula One Australian Grand Prix race day.Sports · Formula 1 · Albert Park Circuit, Melbourne · Wikipedia | Albert Park Circuit, Melbourne | annual | Wikipedia | |
| Divine Mercy SundayThe Second Sunday of Easter.Religion · Catholic · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| International Day for Mine Awareness and Assistance in Mine ActionA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Deep Dish Swift 2027UnverifiedThis is a Swift and Apple developer conference covering Swift, iOS, macOS, indie dev, design, and tooling.Tech · Conferences · to Apr 6 · Chicago, IL · Josh & Kari Holtz | Chicago, IL; Josh & Kari Holtz | annual | Josh & Kari Holtz | |
| Google Cloud retires Python 3.10UnverifiedCloud Run functions ends support for this runtime.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Apr 5Monin 4 months | 2027 NCAA men's basketball championship gameThe men's national championship game.Sports · NCAA · Ford Field, Detroit · Wikipedia | Ford Field, Detroit | annual | Wikipedia |
| Qingming Festival (Tomb-Sweeping Day)Families visit and sweep ancestors’ graves; the solar term when the Sun reaches 15° ecliptic longitude.Culture · Lunar calendar festivals · Hong Kong Observatory | – | annual | Hong Kong ObservatoryComputed (rule) | |
| Ching Ming Festival (Hong Kong)A public holiday in Hong Kong.Holidays · Hong Kong · Hong Kong · Nager.Date | Hong Kong | annual | Nager.Date | |
| AnnunciationThe angel Gabriel’s announcement to Mary (Lady Day). Moved from March 25 this year (Holy Week, the Easter octave or a Sunday).Religion · Catholic · USCCB liturgical year | – | annual | USCCB liturgical yearComputed (rule) | |
| 125th anniversary: A spectator stand collapsed during a football match at Ibrox Park in Govan, ScotlandIn 1902, A spectator stand collapsed during a football match at Ibrox Park in Govan, Scotland, killing 25 supporters and injuring more than 500 others.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 25th anniversary: In the first reported data breach, 250,000 social security numbers collected by...In 2002, In the first reported data breach, 250,000 social security numbers collected by the State of California were stolen from a data center.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Gloria Macapagal Arroyo, born 1947 (80 years)Filipino academic and politician, 14th President of the Philippines.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| Joseph Lister, born 1827 (200 years)English surgeon and academic (died 1912).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of ConscienceA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| RSAC 2027 ConferenceMajor cybersecurity conference and expo.Tech · Conferences · to Apr 8 · San Francisco, SF Bay Area, CA · RSAC | San Francisco, SF Bay Area, CA; RSAC | annual | RSAC | |
| Apr 6Tuein 4 months | New moonThe Moon is between Earth and the Sun; darkest nights for stargazing.Sky · Moon phases · 6:51 pm CT · NASA | – | monthly | NASAComputed (rule) |
| 375th anniversary: Dutch sailor Jan van Riebeeck landed at Table Bay in southern Africa,...In 1652, Dutch sailor Jan van Riebeeck landed at Table Bay in southern Africa, establishing a settlement that later became known as Cape Town.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| 2027 Wisconsin Supreme Court electionStatewide election for a seat on the Wisconsin Supreme Court.Politics · US and Minnesota elections · Wisconsin · Wikipedia | Wisconsin | every few years | Wikipedia | |
| International Day of Sport for Development and PeaceA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Cyber Risk & Insurance Innovation USA 2027UnverifiedThis event brings together senior cyber insurance and risk leaders to explore issues shaping the market, from AI and systemic risk to underwriting,...Tech · Conferences · to Apr 8 · Chicago, IL · Newton.Media | Chicago, IL; Newton.Media | annual | Newton.Media | |
| Microsoft retires claude-opus-4-7 (1)UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires grok-4-20-non-reasoning (1)UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires grok-4-20-reasoning (1)UnverifiedMicrosoft Foundry ends support for this model.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Apr 7Wedin 4 months | Ugadi and Gudi PadwaTentativeThe Hindu lunar new year: Ugadi in Karnataka, Andhra Pradesh and Telangana, Gudi Padwa in Maharashtra, Cheti Chand for Sindhis. Chaitra, Shukla 1. Regional...Religion · Hinduism · Wikipedia | – | annual | WikipediaComputed (rule) |
| World Health DayA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| Karume Day (Tanzania)A public holiday in Tanzania, known locally as Siku ya Karume.Holidays · Tanzania · Tanzania · Nager.Date | Tanzania | annual | Nager.Date | |
| Annunciation of the Theotokos (Julian calendar)One of the Twelve Great Feasts; kept even in Holy Week. March 25 in the Julian calendar.Religion · Eastern Orthodox · Orthodox Church in America | – | annual | Orthodox Church in AmericaComputed (rule) | |
| Chaitra NavratriTentativeThe spring Navratri, nine nights of the goddess ending at Ram Navami. Chaitra, Shukla 1. Regional dates can differ by a day.Religion · Hinduism · to Apr 15 · Wikipedia | – | annual | WikipediaComputed (rule) | |
| Pope Clement XII, born 1652 (375 years)Pope Clement XII (died 1740).People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| International Day of Reflection on the 1994 Genocide against the Tutsi in RwandaA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| BSides Prague 2027A two-day tech conference in Prague, Czech Republic.Tech · Conferences · to Apr 8 · Prague, Czech Republic · Independent | Prague, Czech Republic; Independent | annual | Independent | |
| TECHSPO Los Angeles 2027UnverifiedA technology expo covering AI, SaaS, AdTech, and MarTech for marketing, technology, and innovation professionals.Tech · Conferences · Los Angeles, CA · TECHSPO Technology Expo Global Series | Los Angeles, CA; TECHSPO Technology Expo Global Series | annual | TECHSPO Technology Expo Global Series | |
| Apr 8Thuin 5 months | Hanamatsuri (Buddha’s Birthday in Japan)Flower festival: sweet tea is poured over a statue of the infant Buddha.Religion · Buddhism · Wikipedia | – | annual | WikipediaComputed (rule) |
| April 2027 LSATLSAT primary test dates.Academic · Exams · to Apr 10 · US test centers · LSAC | US test centers | annual | LSAC | |
| AWS retires Claude Sonnet 4.5UnverifiedAmazon Bedrock ends support for this model.Tech · Retirements · AWS · AWS | AWS | one-off | AWS | |
| Apr 9Friin 5 months | Day of Valor (Philippines)A public holiday in the Philippines, known locally as Araw ng Kagitingan.Holidays · Philippines · Philippines · Nager.Date | Philippines | annual | Nager.Date |
| Coachella 2027, weekend oneFirst weekend of the Coachella Valley Music and Arts Festival; the second runs April 16 to 18.Culture · Music · to Apr 11 · Empire Polo Club, Indio, California · Coachella | Empire Polo Club, Indio, California | annual | Coachella | |
| Apr 10Satin 5 months | Stream trout season opens (MN)Stream trout, Statewide inland streams.Outdoors · Fishing · Statewide inland streams · Minnesota DNR | Statewide inland streams | annual | Minnesota DNR |
| Steven Seagal, born 1952 (75 years)American actor, producer, and martial artist.People · Birth anniversaries · Wikipedia | – | annual | Wikipedia | |
| ACT national test dateNational ACT test date.Academic · Exams · US test centers · ACT | US test centers | annual | ACT | |
| 2027 Gambian parliamentary electionGambia votes: Parliament.Politics · Elections worldwide · Gambia · Wikipedia | Gambia | every few years | Wikipedia | |
| Apr 11Sunin 5 months | 2027 Japanese Grand PrixFormula One Japanese Grand Prix race day.Sports · Formula 1 · Suzuka Circuit, Suzuka · Wikipedia | Suzuka Circuit, Suzuka | annual | Wikipedia |
| 25th anniversary: In a coup attempt, members of the Venezuelan military detained President Hugo...In 2002, In a coup attempt, members of the Venezuelan military detained President Hugo Chávez and demanded his resignation.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Google Cloud retires Google Kubernetes Engine 1.35Google Kubernetes Engine ends support for this runtime.Tech · Retirements · Google Cloud · Google Cloud | Google Cloud | one-off | Google Cloud | |
| Apr 12Monin 5 months | 1400th anniversary: King Edwin of Northumbria was baptised by Bishop Paulinus of YorkIn 627, King Edwin of Northumbria was baptised by Bishop Paulinus of York.History · Anniversaries · Wikipedia | – | annual | Wikipedia |
| International Day of Human Space FlightA United Nations international day.Observances · UN international days · United Nations | – | annual | United Nations | |
| 2027 ITS America Conference & ExpoUnverifiedA conference reimagining transportation through technology, discussing AI, digital infrastructure, V2X, automated vehicles, and multimodal mobility.Tech · Conferences · to Apr 15 · Salt Lake City, UT · ITS America Events with ITS America | Salt Lake City, UT; ITS America Events with ITS America | annual | ITS America Events with ITS America | |
| SREcon27 AmericasA three-day tech conference in Seattle, WA.Tech · Conferences · to Apr 14 · Seattle, WA · USENIX | Seattle, WA; USENIX | annual | USENIX | |
| Apr 13Tuein 5 months | Songkran (Thai New Year)The Theravada new year of Thailand, with Pi Mai in Laos, Thingyan in Myanmar and Choul Chnam Thmey in Cambodia: temple visits, merit-making and water throwing.Religion · Buddhism · to Apr 15 · Wikipedia | – | annual | WikipediaComputed (rule) |
| 2027 NBA play-in tournamentSeeds 7 to 10 in each conference play for the last playoff spots.Sports · NBA · to Apr 16 · Wikipedia | – | annual | Wikipedia | |
| 250th anniversary: American Revolutionary War: British and Hessian forces conducted a surprise...In 1777, American Revolutionary War: British and Hessian forces conducted a surprise attack against a Continental Army outpost at Bound Brook, New Jersey.History · Anniversaries · Wikipedia | – | annual | Wikipedia | |
| Analytics and Data Summit 2027UnverifiedThis summit brings together Oracle data and analytics professionals to explore trends and innovations in data analytics, AI, and machine learning.Tech · Conferences · to Apr 15 · Redwood Shores, CA · Oracle | Redwood Shores, CA; Oracle | annual | Oracle | |
| Google Cloud Next 2027Google Cloud's flagship conference on cloud infrastructure, data and AI.Tech · Conferences · to Apr 15 · Las Vegas, NV · Google | Las Vegas, NV; Google | annual | ||
| First quarter moonThe Moon is half lit (waxing).Sky · Moon phases · 5:57 pm CT · NASA | – | monthly | NASAComputed (rule) | |
| Microsoft end of support: Visual Studio 2017Visual Studio 2017 reaches end of support.Tech · Launches · Microsoft | – | annual | Microsoft | |
| Microsoft retires System Center 2022 Data Protection ManagerUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires System Center 2022 Operations ManagerUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires System Center 2022 OrchestratorUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |
| Microsoft retires System Center 2022 Service ManagerUnverifiedMicrosoft Lifecycle ends support for this product.Tech · Retirements · Microsoft · Microsoft | Microsoft | one-off | Microsoft | |