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Lei Day
State of Hawaiʻi Department of Land and Natural Resources / state law history
Observance library
Browse all researched observances
2,411 researched observances. Search for a specific name or known alternate name.
Source-backedFixed AnnualIn-depth guide
Leif Erikson Day
36 U.S.C. §114 provides that the President may issue each year a proclamation designating October 9 as Leif Erikson Day.
Source-backedRule Based AnnualIn-depth guide
Letter Carriers’ Stamp Out Hunger® Food Drive
NALC states that its annual Letter Carriers’ Stamp Out Hunger® Food Drive launched in 1993 and is held on the second Saturday in May. NALC also states that branch, rural-office and individu…
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LGBTQ+ Center Awareness Day
CenterLink currently observes Center Awareness Day every October 19; its 2011 annual report documents a third annual edition, while a 2012 participating-center archive credits CenterLink an…
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Liberation Day
Falkland Islands National Archives states that Liberation Day has been celebrated annually as a public holiday on June 14 from 1983 onward; United Nations material records an ongoing Argent…
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Liberation Day
Government of Guam and Mayors Council materials verify July 21 Liberation Day and current annual parade/memorial programming; the project does not infer a first recurring edition solely fro…
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Liberation Day
Official Liberation Day Guernsey material verifies annual May 9 observance, current States of Guernsey Sport and Culture management and the 1945 liberation context.
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Liberation Day
Kuwait Government Online states that Liberation Day is 26 February and announced 25–26 February as official holidays for National and Liberation Days in 2026.
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Liberation Day
Afghanistan Ministry of Foreign Affairs and 2026 Mumbai consular holiday calendar; institutional English naming differs
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Liberation Day (Bevrijdingsdag)
Dutch government and National Committee sources verify May 5 Liberation Day, its 1946 establishment, 1968 fixed-date rule and current official public-holiday status; employee day-off entitl…
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Liberation Revolution Day / Revolution Day (Algeria)
Algerian government diplomatic sources list November 1 as Liberation Revolution Day, a national public holiday, and tie the date to the outbreak of the Revolution on 1 November 1954.
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Library Lovers’ Day
ALIA verifies February 14 annually, inception in 2006 by the State Library of New South Wales and current ALIA promotion/support with local library adaptation.
Source-backedRule Based AnnualIn-depth guide
Library Shelfie Day
The New York Public Library says Library Shelfie Day occurs every year on the fourth Wednesday of January and that the tradition started in 2014.
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Libya Independence Day
Institutional Libyan legal material lists 24 December Independence Day (1951) under Law No. 5 of 2012, and current state reporting confirms annual government application while historical ev…
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Lips Appreciation Day
The first-party Wellcat Holidays calendar lists Lips Appreciation Day on March 16 and states that Wellcat Holidays were created by Thomas and Ruth Roy. Wellcat’s About page independently de…
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Long Tan Day (historical name; now Vietnam Veterans’ Day)
Australian War Memorial and Department of Veterans’ Affairs: historical Long Tan Day name; now Vietnam Veterans’ Day August 18
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Louis Riel Day
Province of Manitoba
Source-backedEdition SpecificIn-depth guide
Love Your Bookshop Day
The Australian Booksellers Association’s 2026 campaign pages set Love Your Bookshop Day for Saturday 10 October 2026.
Source-backedRule Based AnnualIn-depth guide
Love Your Lawyer Day
The Florida Bar states that Love Your Lawyer Day is celebrated on the first Friday of every November and traces the initiative to ALPIA, with ABA Law Practice recognition.
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Love Your Produce Manager® Day
Frieda’s first-party material places Love Your Produce Manager Day on April 2 and states that the company created the holiday on its 50th anniversary in 2012.
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Loyalty Day
United States Code, title 36 §115
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Lui-Ngai-Ni
The Government of Manipur Department of Tribal Affairs and Hills says Lui-Ngai-Ni is a collective festival of the Nagas observed on 15 February every year and describes it as a seed-sowing…
Source-backedFixed AnnualIn-depth guide
Lui-Ngai-Ni
The Government of Manipur Department of Tribal Affairs and Hills says Lui-Ngai-Ni is observed on 15 February every year and describes it as a collective Naga seed-sowing festival.
Source-backedRule Based AnnualIn-depth guide
Lung Health Day
The American Association for Respiratory Care states that it launched Lung Health Day in 2003 and that the day takes place every year on the Wednesday during National Respiratory Care Week.
Source-backedRule Based AnnualIn-depth guide
Lung Leavin’ Day
Current organizer material identifies Lung Leavin’ Day 2026 on 7 February and explains its survivor-led purpose; the National Cancer Institute also documents the founder’s annual February t…
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Lyndon Baines Johnson Day
Texas Government Code §662.003(b)(5) fixes August 27 as Lyndon Baines Johnson Day in observance of Johnson’s birthday. Texas legislative/history sources trace the holiday to 1973 legislatio…
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Mabo Day
AIATSIS directly identifies Mabo Day as celebrated on 3 June each year; Australian government legal material verifies the 3 June 1992 High Court decision and separates the later Native Titl…
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Macao S.A.R. Establishment Day
Macao SAR Government
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Macaroni Day
Two Association of Nutrition & Foodservice Professionals chapter calendars list Macaroni Day on 14 July.
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Macintosh launch anniversary
The Computer History Museum records that Apple released the Macintosh on 24 January 1984.
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Madaraka Day
Constitution of Kenya, Article 9; Government of Kenya commemoration
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Magna Carta anniversary
The National Archives verifies 15 June 1215 at Runnymede; Egham Museum documents a recurring annual Magna Carta Day on the closest Saturday to June 15 and local Chamber material documents o…
Source-backedEdition SpecificIn-depth guide
Major League Baseball Opening Day
MLB’s master schedule distinguishes a special Opening Night on March 25 from traditional Opening Day on March 26, 2026.
Source-backedRule Based AnnualIn-depth guide
Make A Difference Day
Points of Light documents Make A Difference Day as beginning in 1992 and taking place annually on the fourth Saturday in October.
Source-backedFixed AnnualIn-depth guide
Make Up Your Own Holiday Day
The first-party Wellcat Holidays calendar lists Make Up Your Own Holiday Day on March 26 and identifies Thomas and Ruth Roy as creators of the collection; no launch year or formal legal sta…
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Malala Day
The Malala Fund continues to use Malala Day around 12 July to amplify girls’ education and young people’s voices, building on Malala Yousafzai’s UN address.
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Malaysia Day
Government of Malaysia official portal
Source-backedFixed AnnualIn-depth guide
Malaysia Independence Day / Hari Kemerdekaan
Malaysia’s official government portal lists Hari Kebangsaan on August 31 as a nationwide federal public holiday; National Archives material verifies the 31 August 1957 independence proclama…
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Malbec World Day
Wines of Argentina / Malbec World Day
Source-backedFixed AnnualIn-depth guide
Maldives Independence Day
Maldives government sources identify 26 July 1965 as the date of full independence from British protectorate status; current 2026 government calendars and Presidency material continue the o…
Source-backedFixed AnnualIn-depth guide
MAR10 Day / Mario Day
Nintendo official material verifies March 10 as MAR10 Day / Mario Day and the MAR 10 → MARIO visual wordplay; original creator, formal adoption year and first recurring edition remain unass…
Source-backedEdition SpecificIn-depth guide
March equinox (Northern Hemisphere spring equinox)
The U.S. Naval Observatory Earth’s Seasons service gives the March 2027 equinox as 20 March 2027 at 20:25 UT and explains that equinox/solstice season names use the Northern Hemisphere conv…
Source-backedVariable CustomIn-depth guide
March equinox / astronomical spring begins (Northern Hemisphere)
The U.S. Naval Observatory publishes target-year equinox instants and explains that equinoxes mark the beginning of spring or autumn depending on hemisphere.
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March First Independence Movement Day
Republic of Korea law and Ministry sources verify March 1 Samiljeol, the 1919 movement, the 1949 National Holidays Act framework and current national/public-holiday status.
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Marine Corps Birthday
The U.S. Marine Corps states that Marines around the world celebrate the birth of the Corps each year on 10 November.
Source-backedRule Based AnnualIn-depth guide
Marine Day (Umi no Hi)
Cabinet Office, Government of Japan
Source-backedEdition SpecificIn-depth guide
Marine Mammal Rescue Day
California Senate Concurrent Resolution 39 became Resolution Chapter 48, Statutes of 2017, recognizing 27 April 2017 as Marine Mammal Rescue Day and commending the Marine Mammal Stranding N…
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Marketing Operations Appreciation Day
Zapier’s own 2023 campaign page states that Marketing Operations Appreciation Day is April 11 and describes it as an annual recognition initiative.
Source-backedFixed AnnualIn-depth guide
Marmot Day
Alaska legislation establishes 2 February of each year as Marmot Day and provides for suitable observance; Alaska State Archives also lists the day among state-designated dates.
Source-backedRule Based AnnualIn-depth guide
Martin Luther King Jr. / Civil Rights Day
Arizona’s official 2026 holiday calendar lists Martin Luther King Jr. / Civil Rights Day on Monday, 19 January.
Source-backedRule Based AnnualIn-depth guide
Martin Luther King Jr. Day / Idaho Human Rights Day
Idaho Code § 73-108 and Idaho judicial/state holiday calendars place Martin Luther King, Jr. – Idaho Human Rights Day on the third Monday in January; Idaho government history records the co…
Source-backedFixed AnnualIn-depth guide
Martyrdom Day of Shaheed Udham Singh
India’s Ministry of Information and Broadcasting states that Shaheed Udham Singh’s martyrdom day is observed on 31 July every year.
Source-backedFixed AnnualIn-depth guide
Martyred Intellectuals Day
Bangladesh government rules list Martyred Intellectuals Day on December 14 among national days connected with the Liberation War.
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Martyrs Day
Eritrea’s Ministry of Information identifies 20 June as Martyrs Day and documents official 2026 commemorations by government institutions and regions.
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Martyrs’ Day
Current Malian official sources identify March 26 as Journée des Martyrs tied to victims of the March 1991 events; official diplomatic information lists it among public holidays.
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Martyrs’ Day
Malawi government material states that Martyrs’ Day is observed annually on 3 March to honor those who sacrificed their lives for freedom and self-rule.
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Martyrs’ Day
South Sudan’s Ministry of Foreign Affairs states that the government declared 30 July Martyrs’ Day to honor John Garang and others who died in the struggle for independence.
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Martyrs’ Day (Togo)
The official Togolese government site states that Togo commemorates Martyrs’ Day every 21 June in memory of those killed in the independence struggle and confirms that the day is a public h…
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Maryland Day
Maryland State Archives
Source-backedFixed AnnualIn-depth guide
Mashujaa Day (Kenya)
Office of the President of the Republic of Kenya
Source-backedFixed AnnualIn-depth guide
Math 2.0 Day
Maria Droujkova’s MathFuture archive states on July 8, 2010 that the Math 2.0 group and weekly meeting began exactly one year earlier on July 8, 2009. Contemporary 2009 community records co…
Source-backedFixed AnnualIn-depth guide
Math Storytelling Day
Natural Math’s first-party toolkit says Math Storytelling Day is celebrated on September 25 and explains how Maria Droujkova and Sue VanHattum developed the observance.
Source-backedFixed AnnualIn-depth guide
May 4 Day of Remembrance
Kent State University documents an official May 4 Day of Remembrance established in 1977 and a recurring remembrance tradition that includes a candlelight walk and vigil dating to 1971.
Source-backedFixed AnnualIn-depth guide
May Day / International Workers’ Day
The International Labour Organization marks May Day on 1 May and publishes current worker-focused material.
Source-backedFixed AnnualIn-depth guide
Mean Girls Day
October 3 is a grassroots Mean Girls fan observance built around the film scene in which Cady gives Aaron the date. Paramount has repeatedly recognized and activated the fan date, including…
Source-backedRule Based AnnualIn-depth guide
Medical Assistants Recognition Day
AAMA’s recognition-week materials designate Wednesday as Medical Assistants Recognition Day; AAMA’s 2026 week runs October 19–23, placing the recognition day on October 21, 2026.
Source-backedRule Based AnnualIn-depth guide
Melanoma Monday®
The American Academy of Dermatology states that it launched Melanoma Monday® on 1 May 1995, has observed it every year since, and holds it on the first Monday in May as the opening of its U…
Source-backedRule Based AnnualIn-depth guide
Memorial Day
U.S. federal sources document the Grand Army of the Republic’s General Orders No. 11 of May 5, 1868, the May 30 Decoration Day observance, and current federal law placing Memorial Day on th…
Source-backedFixed AnnualIn-depth guide
Memorial Day
The Republic of Korea’s official Korea.net carries the presidential Memorial Day address on 6 June 2026, confirming the current observance identity and date.
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Memorial Day (Timor-Leste)
Timor-Leste Law No. 3/2016 amended the public-holidays law so 7 December is Memorial/Memory Day, commemorating those who resisted the Indonesian occupation and fought for national liberatio…
Source-backedFixed AnnualIn-depth guide
Memorial of Saint Anthony of Padua
Vatican News’ saint calendar places Saint Anthony of Padua on June 13.
Source-backedFixed AnnualIn-depth guide
Memorial of Saints Basil the Great and Gregory Nazianzen, Bishops and Doctors of the Church
USCCB identifies 2 January as the Memorial of Saints Basil the Great and Gregory Nazianzen, Bishops and Doctors of the Church.