December 2025 observances

Bifocals At The Monitor Liberation Day

United States / creator-defined informal Wellcat observance

Thomas and Ruth Roy’s first-party Wellcat Holidays calendar lists Bifocals At The Monitor Liberation Day on December 1 and identifies Wellcat Holidays as their created, copyrighted holiday…

Central African Republic national day / Republic Day

Central African Republic / national day

Finland's Ministry for Foreign Affairs diplomatic national-day registry lists the Central African Republic on December 1.

Freedom and Democracy Day

Chad / national commemoration and national-holiday framework

Chad’s Prime Minister’s office documented the official 1 December 2025 commemoration of the 35th Freedom and Democracy Day, and current constitutional/journal-official material lists 1 Dece…

Indigenous Faith Day

Arunachal Pradesh, India / state government holiday calendar

Arunachal Pradesh government holiday calendars list Indigenous Faith Day on 1 December, including the 2024 notification and 2026 state portal calendar.

Day of the First President of the Republic of Kazakhstan

Kazakhstan / official commemorative holiday date; no longer a non-working national/state public holiday under the current holidays law

A 2011 law added December 1 as First President’s Day to Kazakhstan’s public-holiday law. Later legal changes removed it from the non-working holiday law, while the government’s current list…

National Cookie Cutter Day

United States / informal baking and food observance

National Today and Days Of The Year independently place National Cookie Cutter Day on December 1 each year.

National Peppermint Bark Day

United States / Williams Sonoma creator-backed food observance

Williams Sonoma’s first-party releases identify December 1 as the annual National Peppermint Bark Day celebration; current observance history also attributes the holiday launch to Williams…

National Women Support Women Day

United States / Amy O’Donnell-created women-support observance

National Day Archives records December 1 and Amy O’Donnell as the creator in 2018.

Dia da Restauração da Independência

Portugal / national restoration commemoration and holiday

Portugal’s Armed Forces commemorated Dia da Restauração da Independência on 1 December 2025, marking the restoration of national sovereignty in 1640; the Government’s national-holiday regis…

Prisoners for Peace Day

War Resisters’ International / international peace and conscientious-objection solidarity campaign

War Resisters’ International documents 1 December as Prisoners for Peace Day and traces the observance to 1957; WRI annual reporting independently records the 1 December campaign date.

National Day

Romania

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Romania — National Day on 1 December. The source verifies the diplomatic national-day ident…

State Inauguration Day

Nagaland statehood/inauguration commemoration; historically listed as a state general holiday

Government of Nagaland

World AIDS Day

Global health observance

United Nations observance

International Day for the Abolition of Slavery

United Nations international observance

A/RES/317(IV)

Asom Divas (Su-Ka-Pha Divas)

Assam government cultural/state observance

Government of Assam Department of Cultural Affairs

National Day

Lao People’s Democratic Republic

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Lao People’s Democratic Republic — National Day on 2 December. The source verifies the dipl…

Special Education Day

United States / SPEDCO-created education observance tied to the 1975 federal special-education law anniversary

The Special Education Day organization identifies December 2 as the observance and says it was launched in 2005 to mark the anniversary of the 1975 federal special-education law.

UAE National Day

United Arab Emirates

The UAE Government’s official public-holidays page states that UAE National Day falls on 2 December and marks the federal unification in 1971; its current holiday listing also covers the Na…

World Computer Literacy Day

NIIT-led global digital-literacy campaign

NIIT’s first-party campaign material identifies World Computer Literacy Day on 2 December and describes its recurring digital-literacy movement.

World Futures Day

UNESCO international day

Proclaimed by UNESCO General Conference in 2021

World Pollution Prevention Day

International / informal environmental-awareness observance

National Today and EventGuide independently place World Pollution Prevention Day on December 2 each year.

Día de Navarra

Navarre regional civic holiday

Foral Law 18/1985, published in the Spanish Official State Gazette

International Day of Persons with Disabilities

United Nations / international observance

A/RES/47/3

National Green Bean Casserole Day

United States / informal food observance

National Today and AnydayGuide independently place National Green Bean Casserole Day on December 3.

National Make a Gift Day

United States and wider informal craft-and-giving observance

National Today uses National Make a Gift Day and Days Of The Year uses Make A Gift Day; both place the observance on December 3 each year.

International Cheetah Day

international cheetah conservation awareness observance

Cheetah Conservation Fund (CCF)

International Day Against Unilateral Coercive Measures

United Nations / international observance

A/RES/79/293

International Day of Banks

United Nations / international observance

A/RES/74/245

Navy Day

India — Indian Navy observance

Government of India Ministry of Defence / Press Information Bureau

Bathtub Party Day

United States / creator-defined informal Wellcat observance

Thomas and Ruth Roy’s first-party Wellcat Holidays calendar lists Bathtub Party Day on December 5 and identifies Wellcat Holidays as their created, copyrighted holiday collection.

Farmers’ Day (Ghana)

Ghana / statutory public holiday recognizing farmers and fishers

Ghana’s Ministry of the Interior lists Farmers Day among statutory public holidays on the first Friday in December, and its current 2026 holiday calendar places Farmers’ Day on Friday, 4 De…

National Farmers’ Day

Ghana / national public holiday

Bank of Ghana’s official holiday calendar describes Farmers’ Day as falling on the first Friday of December.

International Volunteer Day for Economic and Social Development

United Nations international observance

A/RES/40/212

National Bartender Day

United States / informal hospitality and bartender-appreciation observance

Absolut and TIPS describe National Bartender Day on the first Friday in December; the rule resolves to December 4 in 2026.

National Father’s Day

Thailand / national observance

Thailand’s Government Public Relations Department states that 5 December, the birthday of the late King Bhumibol Adulyadej The Great, is also observed as Thailand’s National Day and Nationa…

World Soil Day

FAO / United Nations / international observance

A/RES/68/232

Independence Day

Finland

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Finland — Independence Day on 6 December. The source verifies the diplomatic national-day i…

Foundation of Quito commemoration

Quito, Ecuador

Quito municipal communications document the city’s annual December foundation commemoration and anniversary events

Global Fat Bike Day

International / grassroots fat-bike cycling community

Cycling-community sources describe Global Fat Bike Day as a grassroots celebration held on the first Saturday of December; Flatlands Cycling lists 5 December for 2026.

National Day of Remembrance and Action on Violence Against Women

Canada

The Government of Canada states that 6 December is the National Day of Remembrance and Action on Violence Against Women, designated by Parliament and connected to remembering the 14 women k…

National Miners Day

United States — miner recognition observance

U.S. Department of Labor / Mine Safety and Health Administration; Congress-designated observance

National Patio Day

Australia / Stratco and Cancer Council fundraising and sun-safety campaign

Stratco states that it launched National Patio Day with Cancer Council in 2019 on the first Saturday of summer; its 2020 materials explicitly say the day is always on the first Saturday of…

National Rhubarb Vodka Day

United States / informal alcohol-related food-and-drink observance

Days Of The Year and Checkiday independently define National Rhubarb Vodka Day as the first Saturday in December; the rule is retained rather than hard-coding a single year’s date.

SKYWARN Recognition Day

United States / National Weather Service and amateur-radio community

National Weather Service material describes the first Saturday in December as SKYWARN Recognition Day. The national 2025 event was cancelled while organizers discussed redevelopment, so cur…

Armed Forces Flag Day

India

Government of India material identifies 7 December as Armed Forces Flag Day and describes it as an annual day connected with honouring armed-forces personnel and supporting welfare initiati…

International Civil Aviation Day

ICAO / United Nations / international observance

A/RES/51/33

Memorial Day

Timor-Leste / fixed public holiday

Timor-Leste’s official 2026 holiday list, applying Law No. 10/2005, lists 7 December as Memorial Day among fixed public holidays.

National Cotton Candy Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Cotton Candy Day on 7 December.

National Illinois Day

United States / National Day Calendar National State Days series — Illinois

National Day Calendar lists National Illinois Day on 7 December. The U.S. Senate records Illinois’s admission/statehood date as 3 December 1818. The two dates are deliberately kept separate…

National Letter Writing Day

United States / informal letter-writing observance with long-running museum and cultural-institution usage

The Smithsonian National Museum of American History identifies December 7 as National Letter Writing Day, and the University of Michigan Clements Library documented the same date in 2009 wh…

National Pearl Harbor Remembrance Day

United States / statutory national remembrance

36 U.S.C. §129 designates December 7 as National Pearl Harbor Remembrance Day and requests annual observance and half-staff display in honor of those who died as a result of service at Pear…

Constitution Day

Uzbekistan

The Government of Uzbekistan identifies 8 December as Constitution Day and states that it is a national public holiday.

Solemnity of the Immaculate Conception of the Blessed Virgin Mary

Catholic Church / Roman liturgical calendar

Vatican City’s official observance page identifies 8 December as the Solemnity of the Immaculate Conception of the Blessed Virgin Mary.

Día de la Madre

Panama / current national observance

Panama’s Ministry of Government currently observes Día de las Madres on 8 December. The historical 1930 Law 69 that declared the date a holiday is recorded by Infojurídica as repealed by La…

National Lard Day

United States / informal Healthy Fats Coalition-created culinary awareness campaign

Healthy Fats Coalition first-party material repeatedly marks December 8 as National Lard Day and describes the observance as the coalition’s brainchild.

Saint Clement of Ohrid Day

North Macedonia / public-holiday and cultural context

North Macedonia government tourism information lists 8 December for St. Clement of Ohrid among official holidays.

Día de la Virgen de Caacupé

Paraguay / national holiday

Paraguay Law No. 7544/2025 lists December 8, Día de la Virgen de Caacupé, among national holidays and states that holidays outside the movable list remain on their dates each year.

Christmas Card Day

Informal Christmas-season greeting-card observance

Hallmark’s December observance calendar and timeanddate both identify December 9 as Christmas Card Day.

International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime

United Nations / international observance

A/RES/69/323

International Anti-Corruption Day

United Nations / international observance

A/RES/58/4

International Day of Veterinary Medicine

Veterinary/pet-awareness calendar usage; international in name, without evidence here of an intergovernmental designation

The Animal Medical Center lists International Day of Veterinary Medicine on December 9 across multiple annual veterinary-awareness calendars, including 2024, 2025 and 2026.

National Opal Apples Day

United States / Opal Apples brand campaign

Opal Apples maintains a dedicated National Opal Apples Day campaign asset, while current observance calendars consistently place the campaign on December 9.

Independence Day

Tanzania / national public holiday

Official Tanzanian mission holiday listings identify 9 December as Independence Day and a public holiday.

V.C. Bird Day / National Heroes Day

Antigua and Barbuda / national holiday calendar

The Government of Antigua and Barbuda lists V.C. Bird Day on 9 December; its Government Information Service also identifies 9 December as V.C. Bird Day/National Heroes Day.

Constitution Day

Thailand

Thailand’s Board of Investment official 2026 holiday information lists 10 December 2026 as Constitution Day.

Human Rights Day

United Nations international observance

A/RES/423 (V)

International Animal Rights Day

Global animal-rights / animal-welfare advocacy observance

World Animal Protection states that International Animal Rights Day is observed on December 10 every year and is used to advocate for recognition and protection of animals as sentient being…

Victory Day

Iraq / national commemoration

Iraq's Ministry of Higher Education and Scientific Research publishes annual Victory Day messages on December 10 commemorating victory over terrorism/ISIS.

Nobel Day

Nobel Foundation / Nobel Prize award ceremonies in Oslo and Stockholm

The Nobel Foundation identifies 10 December as Nobel Day, when the Nobel Prize award ceremonies take place in Oslo and Stockholm

Anniversary of the Statute of Westminster

Canada / federal commemorative and flag protocol

Canadian Heritage states that the anniversary of the Statute of Westminster is celebrated each year on December 11 and describes the associated federal flag protocol.

Proclamation of the Republic of Upper Volta / 11 December national-day context

Burkina Faso / republic-history and national-day context

The Presidency of Burkina Faso states that the Republic of Upper Volta was proclaimed on 11 December 1958. Current government sources call 11 December the national celebration and frame it…

International Mountain Day

United Nations international observance

A/RES/57/245

National Noodle Ring Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Noodle Ring Day on 11 December.

Feast of Our Lady of Guadalupe

Catholic Marian feast with especially strong significance in Mexico and the Americas

Vatican sources identify 12 December as the feast of Our Lady of Guadalupe.

International Day of Neutrality

United Nations / international observance

A/RES/71/275

Jamhuri Day

Kenyan national observance and public holiday

Office of the President of the Republic of Kenya

National Salesperson Day

United States / salesperson appreciation observance

Mercy University’s career-development material states that National Salesperson Day is observed on the second Friday in December; current National Day Calendar material uses the same rule.

Pa-Togan Nengminza Sangma

Meghalaya commemorative holiday

Government of Meghalaya

International Universal Health Coverage Day

United Nations / international observance

A/RES/72/138

Republic Day

Malta / national holiday

The Government of Malta’s 2026 public-holiday page lists December 13 as Republic Day and marks it as a national holiday under Malta’s National Holidays and Other Public Holidays framework.

National Cream Cheese Frosting Day

United States / Arla-created informal culinary observance

Arla Foods announced December 13 as the inaugural National Cream Cheese Frosting Day in 2018.

National Day of the Horse

United States / continuing equine-industry observance with 2004 U.S. Senate designation origin

The U.S. Senate agreed to S. Res. 452 designating December 13, 2004 as National Day of the Horse; the American Horse Council continues to recognize December 13 as National Day of the Horse.

Pick A Pathologist Pal Day

United States / creator-defined informal Wellcat observance

The first-party Wellcat Holidays calendar lists Pick A Pathologist Pal Day on December 13 and identifies the collection as created by Thomas and Ruth Roy.

National Guard Birthday

United States / National Guard institutional anniversary

The National Guard identifies 13 December as its birthday.

International Day against Colonialism in All its Forms and Manifestations

United Nations / international observance

A/RES/80/106

Martyred Intellectuals Day

Bangladesh / national remembrance day

Bangladesh government rules list Martyred Intellectuals Day on December 14 among national days connected with the Liberation War.

National Alabama Day

United States / National Day Calendar National State Days series — Alabama

National Day Calendar lists National Alabama Day on 14 December. The U.S. Senate records Alabama’s admission/statehood date as 14 December 1819. The dates coincide here, but the National Da…

National Energy Conservation Day

India / Bureau of Energy Efficiency, Ministry of Power

India’s Bureau of Energy Efficiency states that December 14 was declared National Energy Conservation Day and that the annual awards function is organized on December 14 each year.

The Compassionate Friends Worldwide Candle Lighting

worldwide remembrance observance for children who have died

The Compassionate Friends; annual remembrance begun in 1997

Bill of Rights Day

United States commemorative observance

U.S. presidential proclamation / GovInfo

Cat Herders' Day

United States / creator-defined informal Wellcat observance

Thomas and Ruth Roy’s Wellcat calendar lists Cat Herders' Day on December 15.

National Cupcake Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Cupcake Day on 15 December.

National Lemon Cupcake Day

United States / informal food observance

National Today and Days Of The Year independently state that National Lemon Cupcake Day recurs every December 15.

National Wear Your Pearls Day

United States / motivational observance founded by DeAnna Heard

National Day Calendar states that DeAnna Heard founded the observance, that its registrar approved it in 2015, and that it is observed on 15 December.

World Turkic Language Family Day

UNESCO / international observance

UNESCO 43 C/57

National Day

Bahrain

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Bahrain — National Day on 16 December. The source verifies the diplomatic national-day iden…

Day of Reconciliation

South Africa

The South African Government’s public-holidays page lists Day of Reconciliation on 16 December.

Independence Day of Kazakhstan

Kazakhstan / state holiday

Kazakhstan’s official government portal states that Independence Day is celebrated annually on 16 December and the 2026 holiday schedule lists Kazakhstan Independence Day on 16 December.

National Chocolate Covered Anything Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Chocolate Covered Anything Day on 16 December.

Victory Day

Bangladesh / national victory commemoration

Bangladesh Armed Forces Division states that Victory Day is celebrated on 16 December to commemorate the 1971 victory in the Liberation War.

Vijay Diwas

India; military remembrance of the 1971 victory

Government of India material states Vijay Diwas is observed on 16 December every year to commemorate India’s 1971 victory.

Bhutan National Day

Bhutan

National Device Appreciation Day

United States / informal technology-appreciation observance

National Today gives National Device Appreciation Day an every-December-17 recurrence, and EventGuide independently lists it every December 17.

National Maple Syrup Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Maple Syrup Day on 17 December.

National Maple Syrup Day Canada

Canada / informal food observance; date also recognized across North America

National Today places the Canada-labelled observance on December 17, while U.S. GovInfo independently notes that National Maple Syrup Day is an unofficial observance celebrated annually on…

Wright Brothers Day

United States / statutory aviation commemoration

36 U.S.C. §143 designates December 17 as Wright Brothers Day and states that it commemorates the first successful heavier-than-air mechanically propelled airplane flights by Orville and Wil…

Answer the Telephone Like Buddy the Elf Day

United States / informal pop-culture observance inspired by the film Elf

National Day Calendar places the observance on December 18, and National Today independently specifies every December 18.

Arabic Language Day

United Nations / international observance

United Nations language observance

Guru Ghasidas Jayanti

Chhattisgarh, India / High Court holiday-calendar evidence

High Court of Chhattisgarh calendars list Guru Ghasidas Jayanti on 18 December in both 2025 and 2026, supporting a stable December 18 date within that court-calendar scope.

International Migrants Day

United Nations international observance

A/RES/55/93

National Crime Junkie Day

United States / Crime Junkie fan-community anniversary observance

Crime Junkie’s own fifth-anniversary page announced National Crime Junkie Day for December 18, 2022; subsequent observance references retain December 18 as the fan-community date.

National Roast Suckling Pig Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Roast Suckling Pig Day on 18 December.

National Day

Qatar

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Qatar — National Day on 18 December. The source verifies the diplomatic national-day identi…

Goa Liberation Day

Goa, India

The Government of Goa’s Department of Information and Publicity 2025 Liberation Day message identifies 19 December 1961 as the day marking Goa’s liberation from Portuguese rule and its inte…

International Day of Recognition for Women Searchers of Missing Persons

United Nations / international observance

A/RES/80/L.108

National Hard Candy Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Hard Candy Day on 19 December.

National Oatmeal Muffin Day

United States / informal food observance

Independent observance calendars identify December 19 as National Oatmeal Muffin Day.

National Ugly Christmas Sweater Day

International informal holiday-season observance

National Day Calendar states that National Ugly Christmas Sweater Day now occurs on the third Friday of December and lists 18 December for 2026.

National Underdog Day

United States / informal recognition observance

Current observance references place National Underdog Day on the third Friday in December and attribute its creation to Peter Moeller.

International Human Solidarity Day

United Nations / international observance

A/RES/60/209

Macao S.A.R. Establishment Day

Macao Special Administrative Region obligatory holiday

Macao SAR Government

National Fried Shrimp Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Fried Shrimp Day on 20 December.

National Sangria Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Sangria Day on 20 December.

Chester Greenwood Day

Maine statutory commemorative day honoring inventor Chester Greenwood; “Earmuff” in the canonical page title is descriptive rather than the statutory title

Maine law designates 21 December as Chester Greenwood Day in honor of the Farmington inventor associated with ear protectors/earmuffs.

National Coquito Day

Puerto Rican cultural/culinary context / Don Q-created informal seasonal observance

Don Q Rum announced National Coquito Day as an annual December 21 observance and described the 2018 formalization of the day.

National Crossword Puzzle Day

United States / crossword-puzzle appreciation observance

The U.S. Census Bureau’s current December education calendar lists National Crossword Puzzle Day on December 21; the U.S. House Historian has also acknowledged the December observance.

National Maine Day

United States / National Day Calendar National State Days series — Maine

National Day Calendar lists National Maine Day on 21 December. The U.S. Senate records Maine’s admission/statehood date as 15 March 1820. The two dates are deliberately kept separate so the…

World Basketball Day

United Nations / international observance

A/RES/77/324

World Meditation Day

United Nations / international observance

A/RES/79/137

National Mathematics Day (India)

India / Government of India observance marking the birth anniversary of Srinivasa Ramanujan

The Government of India announced 22 December, Ramanujan’s birthday, as National Mathematics Day in 2011; a later Press Information Bureau release states that National Mathematics Day is ce…

National Cookie Exchange Day

United States / informal seasonal baking and social observance

Multiple observance references consistently place National Cookie Exchange Day on December 22.

National Farmers’ Day (Kisan Diwas)

India / farmer-recognition observance commemorating former Prime Minister Chaudhary Charan Singh

ICAR states that Kisan Diwas is observed annually on 23 December and commemorates Chaudhary Charan Singh’s birth anniversary; Press Information Bureau likewise identifies National Farmers D…

HumanLight

Secular humanist holiday/community observance

HumanLight’s official organization identifies 23 December as the holiday and maintains current information about secular humanist celebration.

National Farmers’ Day (Kisan Diwas)

India; farmers and agricultural community recognition

Government of India material identifies National Farmers’ Day, also known as Kisan Diwas, on 23 December.

National Christmas Movie Marathon Day

United States / informal seasonal entertainment observance

National Today places National Christmas Movie Marathon Day on December 23 annually, and EventGuide independently lists it every December 23.

International Anti-Cybercrime Day

United Nations / international observance

A/RES/79/243

Libya Independence Day

Libya / national independence commemoration

The Libyan News Agency reports that Libyans commemorate independence on 24 December and states that the anniversary falls on 24 December each year.

National Consumer Day

India — national consumer-protection observance

Government of India Press Information Bureau / Department of Consumer Affairs

National Egg Nog Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Egg Nog Day on 24 December.

Solemnity of the Nativity of the Lord (Christmas)

Catholic Church / Roman liturgical calendar

Vatican sources identify 25 December as the Solemnity of the Nativity of the Lord, commonly Christmas.

National Pumpkin Pie Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Pumpkin Pie Day on 25 December.

Boxing Day

United Kingdom / bank-holiday calendars

GOV.UK bank-holiday calendars identify Boxing Day and show substitute-day treatment when it falls on a weekend.

Day of Goodwill

South African statutory public holiday

South African public-holiday framework / government source verification

Kwanzaa

African American and Pan-African cultural holiday

The Smithsonian National Museum of African American History and Culture describes Kwanzaa as a week-long African American and Pan-African cultural celebration observed from December 26 to J…

National Candy Cane Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Candy Cane Day on 26 December.

National Thank You Note Day

Informal gratitude/letter-writing observance

Multiple observance references consistently place National Thank You Note Day on December 26.

National Whiners Day

United States / informal humor observance created by Kevin Zaborney

A 1995 Washington Post/Newsday report identifies December 26 and quotes creator Kevin C. Zaborney about the 1986 origin; modern calendar material retains the same date.

Independence and Unity Day

Slovenia / national holiday

The Government of Slovenia states that Independence and Unity Day is celebrated every year on 26 December, marking the announcement of the 1990 independence plebiscite results.

St. Stephen’s Day

Ireland / statutory public-holiday framework

Ireland’s Department of Enterprise lists St. Stephen’s Day on 26 December among the State’s public holidays.

Synaxis of the Most Holy Mother of God

Orthodox Church in America / liturgical commemoration

OCA’s saints calendar states that the Synaxis of the Most Holy Mother of God is commemorated on 26 December.

Death anniversary of Benazir Bhutto

Pakistan / memorial anniversary

Radio Pakistan documented the death anniversary of former Prime Minister Benazir Bhutto on 27 December in consecutive years, supporting the fixed anniversary date without implying a nationw…

International Day of Epidemic Preparedness

United Nations international observance

A/RES/75/27

National Fruit Cake Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Fruit Cake Day on 27 December.

National Make Cut-Out Snowflakes Day

United States and wider informal craft observance

National Today uses National Make Cut-Out Snowflakes Day and Days Of The Year lists Make Cut-Out Snowflakes Day on December 27; both support the same annual date.

Visit the Zoo Day

Informal animal/zoo-interest calendar usage documented by a veterinary institution

The Animal Medical Center lists Visit the Zoo Day on December 27 in multiple annual pet-awareness calendars, including 2022, 2025 and 2026.

The Holy Innocents, Martyrs

Catholic Church / liturgical observance

The USCCB identifies 28 December as the Feast of the Holy Innocents, Martyrs.

National Call a Friend Day

United States / informal friendship observance

National Today and Days Of The Year independently place National Call a Friend Day on December 28 each year.

National Chocolate Candy Day

Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Chocolate Candy Day on 28 December.

National Short Film Day

United States / Film Movement-founded informal cinema observance registered through National Day Calendar

National Day Calendar’s proclamation record identifies Film Movement as the 2019 founder and establishes December 28 as the annual date, chosen to echo the Lumière public film screening ann…

Proclamation Day

South Australia — public-holiday context

Government of South Australia / Public Holidays Act 2023 context

Constitution of Ireland (Bunreacht na hÉireann)

Ireland / constitutional history

The official constitutional text states that Bunreacht na hÉireann was enacted by the people on 1 July 1937 and came into operation on 29 December 1937.

International Cello Day

International music-appreciation observance

Akashvani News, India’s public broadcaster, identifies International Cello Day as an annual 29 December observance and links it to the legacy of cellist Pablo Casals.

Independence Day of Mongolia

Mongolia / statutory public holiday

Mongolia’s official Legal Information System lists 29 December as Independence Day of Mongolia in Labour Law Article 76 on public holidays.

Falling Needles Family Fest

United States / creator-defined informal Wellcat observance

Wellcat Holidays lists Falling Needles Family Fest on December 30 and identifies Thomas and Ruth Roy as the creators of the copyrighted holiday collection.

National Bacon Day

United States / informal food observance

National Day Calendar identifies Bacon Day on December 30 and attributes its creation to Danya Goodman and Meff Leonard in 1997; National Today independently uses December 30 for National B…

Rizal Day

Philippine regular holiday

Philippine Presidential proclamation and Republic Act 8491

World Azerbaijanis Solidarity Day

Azerbaijan / national observance

Azerbaijan’s official presidential holiday information identifies 31 December as World Azerbaijanis Solidarity Day; current presidential messages use the same name.

National Champagne Day

United States / informal Champagne observance

National Day Calendar and National Today independently place National Champagne Day on December 31 each year.

National Heroes Day

Timor-Leste / fixed public holiday

Timor-Leste’s official 2026 holiday list, applying Law No. 10/2005, lists 31 December as National Heroes Day among fixed public holidays.

Restauration de la République

Canton of Geneva, Switzerland / cantonal official holiday

The Canton of Geneva’s official holiday calendar lists Restauration de la République on 31 December, including 31 December 2026 and subsequent calendars.

World Peace Meditation Day

International / informal peace-and-meditation observance

Checkiday and EventGuide independently list World Peace Meditation Day on December 31.