August 2028 observances

Fête d’accession à la souveraineté nationale et internationale / Independence anniversary

Benin / national independence observance

The Government of Benin identifies 1 August as the country’s accession-to-sovereignty celebration and documented the 63rd independence anniversary on 1 August 2023; the government also publ…

Emancipation Day

Guyana / public holiday

Guyana’s Ministry of Home Affairs identifies 1 August as Emancipation Day and has formally declared the date a public holiday under the Public Holidays Act in annual notices.

International Childfree Day

international lifestyle and recognition observance for people who are childfree by choice

International Childfree Day organizers

National Day (Fête Nationale)

Benin / national holiday and independence commemoration

Benin government sources mark 1 August as the Fête Nationale and describe the 2026 celebration as the 66th anniversary of accession to national sovereignty.

National Girlfriend Day

United States / informal relationship observance

National Today gives National Girlfriend Day a fixed August 1 recurrence, and Timeanddate independently lists National Girlfriend Day on August 1 across successive years.

National Minority Donor Awareness Day

United States / HRSA organ-donation awareness context

HRSA’s health observance communications list National Minority Donor Awareness Day on August 1.

National Night Out

United States, territories and participating military-base communities / neighborhood safety and community building

The National Association of Town Watch describes National Night Out as an annual community-building campaign held on the first Tuesday in August, with Texas and select areas observing it on…

National Raspberry Cream 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 Raspberry Cream Pie Day on 1 August.

Respect for Parents Day

United States / informal family-appreciation observance

National Day Calendar places Respect for Parents Day on August 1 and attributes its 1994 creation to Marilyn Dalrymple; EventGuide independently lists it every August 1.

Swiss National Day

Switzerland / national holiday

The Swiss Federal Department of Foreign Affairs states that 1 August is the Swiss national holiday and that the day commemorates the Federal Charter of 1291.

Yorkshire Day

Yorkshire, England civic and cultural observance

The Yorkshire Society documents Yorkshire Day on 1 August and its civic celebration tradition.

National Coloring Book Day

Coloring community / Dover Publications-created observance

Dover Publications states that it launched National Coloring Book Day and identifies August 2 as the celebration date, including its tenth-anniversary material in 2025.

National Ice Cream Sandwich Day

United States / informal food observance with first-party ice-cream-brand corroboration

Baskin-Robbins first-party material identifies August 2 as National Ice Cream Sandwich Day.

Ilinden – Republic Day

North Macedonia / national holiday

A North Macedonian government ministry identifies 2 August as Ilinden – Republic Day in its official holiday message.

Día de la Virgen de los Ángeles

Costa Rica / statutory holiday

Costa Rica's Ministry of Labour states that August 2 commemorates the Virgen de los Ángeles under article 148 of the Labour Code and that the holiday is not moved to another day.

CLOVES Syndrome Awareness Day

International / CLOVES Syndrome Community awareness campaign

The CLOVES Syndrome Community states that CLOVES Syndrome Awareness Day is held every year on August 3.

National IPA Day

Primarily U.S. craft-beer community / informal beer appreciation observance

National Day Calendar documents National IPA Day on the first Thursday in August and attributes the modern observance to Ashley Routson in 2011.

National Watermelon Day

United States / watermelon-promotion observance recognized by the National Watermelon Promotion Board

National Watermelon Promotion Board materials identify August 3 as National Watermelon Day and use it in consumer promotion planning.

Braham Pie Day

Braham, Minnesota / municipal community festival

The official Pie Day site and the City of Braham describe the annual community festival as occurring on the first Friday in August.

Constitution Day

Cook Islands

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Cook Islands — Constitution Day on 4 August. The source verifies the diplomatic national-da…

International Beer Day

International Beer Day organizer / global social celebration

The official International Beer Day site states that the event is held on the first Friday in August and lists 7 August for 2026.

International Clouded Leopard Day

international clouded-leopard awareness observance

The Aspinall Foundation initiative, corroborated by World Animal Protection

National Chocolate Chip Cookie Day

United States / informal food observance with repeated first-party hospitality-brand usage

DoubleTree by Hilton repeatedly identifies August 4 as National Chocolate Chip Cookie Day, including 2025 and 2026 first-party releases.

National White Wine Day

United States / informal wine appreciation observance

Wine Folly and winery event calendars consistently identify August 4 as National White Wine Day.

Single Working Women’s Day

International / Single Working Women’s Affiliate Network (SWWAN) creator-defined observance

SWWAN states that founder Barbara Payne established Single Working Women’s Day in 2006 and identifies 4 August each year. The creator organization’s own history provides a stable annual dat…

Coast Guard Birthday

United States / U.S. Coast Guard institutional anniversary

The U.S. Coast Guard marks its birthday on 4 August.

National Couscous Day

United States / Branded Food Group-created informal culinary observance

Observance references attribute National Couscous Day to Branded Food Group in 2020 and consistently place it on August 5.

National Disc Golf Day

United States / Professional Disc Golf Association community observance

The Professional Disc Golf Association says the first Saturday in August was selected for National Disc Golf Day in 2016.

National Jamaican Patty Day

Golden Krust-created food observance / Jamaican patty appreciation

Golden Krust says it launched National Jamaican Patty Day in 2015 and that it is celebrated annually on the first Saturday in August.

National Oyster Day

United States / informal food and aquaculture observance

USDA NIFA’s August 2025 outreach calendar lists National Oyster Day on August 5, while established observance references repeat August 5 and do not establish a known creator.

American Family Day

Arizona, United States / state statutory holiday

Arizona Revised Statutes §1-301 enumerates the first Sunday in August as American Family Day among Arizona holidays.

Independence Day

Bolivia

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

Farmworker Appreciation Day

United States / workforce-appreciation observance recognized by CDC/NIOSH

The CDC/NIOSH Science Bulletin states that August 6 is Farmworker Appreciation Day and uses the observance to recognize farmworkers and discuss occupational safety and health.

Hiroshima Peace Memorial Ceremony / 6 August remembrance

Hiroshima City peace remembrance of atomic-bomb victims and appeal for nuclear abolition and lasting peace

Hiroshima City states that it holds the Peace Memorial Ceremony every year on 6 August and published the 2026 ceremony schedule.

International Day of Awareness of the Special Development Needs and Challenges of Landlocked Developing Countries

United Nations / international observance

A/RES/79/L.108

Jamaica Independence Day

Jamaica

The Organization of American States’ current country page lists Jamaica National Independence Day as 6 August.

National Friendship Day

United States / informal friendship observance

National Day Calendar and Days Of The Year independently define National Friendship Day as the first Sunday in August each year.

National KidsDay

United States / National KidsDay Alliance youth-and-family observance

California ACR 86 describes National KidsDay as a special day set aside each year on the first Sunday in August and identifies a National KidsDay Alliance including Boys & Girls Clubs of Am…

National Paralegal Day

U.S. paralegal profession recognition observance

The American Bar Association’s Paralegal Resource Center identifies 6 August as National Paralegal Day and says the day was established in 2024 by NALA, NFPA, NALS and AAfPE; NALA likewise…

National Root Beer Float Day

United States / informal food observance repeatedly celebrated by A&W

A&W’s first-party company history states that every August 6 the brand celebrates National Root Beer Float Day, and A&W’s dedicated observance materials likewise use August 6.

National Sisters Day

United States / informal family-appreciation observance

National Day Calendar identifies the first Sunday in August as the annual date and attributes creation in 1996 to Tricia Eleogram; New Jersey workforce-engagement material independently use…

Aged Care Employee Day

Australia / aged-care workforce recognition

Ageing Australia states that Aged Care Employee Day is held annually on August 7 and its 2026 release recognizes workers across aged care, retirement living and seniors housing.

Día de la Batalla de Boyacá

Colombia / national civic commemoration and public holiday

Colombia’s Ministry of Foreign Affairs confirms 7 August 2026 as the commemoration of the Battle of Boyacá and a holiday in Colombia.

British Columbia Day

Legal holiday in British Columbia

British Columbia Day Act

Civic Holiday

Ontario, Canada — recognized holiday in specified Ontario public-service / registry contexts

Government of Ontario regulations and holiday bulletin

Colorado Day

Colorado commemorative day established by statute

Colorado Revised Statutes

Fête de l’Indépendance de la Côte d’Ivoire

Côte d’Ivoire / national independence celebration

The Government of Côte d’Ivoire documented the official 66th independence celebration on 7 August 2026.

Heritage Day

Alberta, Canada / optional general holiday

The Government of Alberta lists Heritage Day on the first Monday in August and identifies it as an optional general holiday rather than one of Alberta’s statutory general holidays.

New Brunswick Day

New Brunswick provincial general holiday

New Brunswick Day Act / Government of New Brunswick

New South Wales Bank Holiday

NSW bank holiday applying to banks and certain financial institutions, not a general statewide public holiday

New South Wales legislation / local government notice

Particularly Preposterous Packaging Day

United States / creator-defined informal Wellcat observance

The Wellcat Holidays creator calendar lists Particularly Preposterous Packaging Day on August 7.

Purple Heart Day

United States / military remembrance observance

U.S. Army sources commemorate Purple Heart Day on 7 August and describe it as observed each year.

Terry Fox Day

Manitoba statutory observance

Legislative Assembly / Laws of Manitoba

Digital Nomad Day

United States-origin / digital-nomad community observance

Rootless Living states that it created Digital Nomad Day and held the second annual observance on August 8, 2021; National Today independently lists August 8 annually.

Happiness Happens Day

Society of Happy People / positive-wellbeing observance

The Society of Happy People identifies 8 August as Happiness Happens Day and maintains a dedicated celebration page for the observance.

International Allyship Day

International / workplace and community allyship observance associated with Integrating Women Leaders Foundation

ISSA event material identifies Integrating Women Leaders Foundation as a founding collaborator of International Allyship Day and states that it is celebrated on 8 August; institutional cale…

International Cat Day

Global cat-welfare awareness / International Cat Care

International Cat Care identifies International Cat Day on August 8 and describes itself as the custodian/coordinator of the day.

National Pickleball Day

United States pickleball-community observance

Current pickleball organizations publicly recognize 8 August as National Pickleball Day, including USA Pickleball communications and Deaf Pickleball USA.

Sneak Some Zucchini onto Your Neighbors' Porch Day

United States / creator-defined informal Wellcat observance

The first-party Wellcat Holidays calendar lists Sneak Some Zucchini onto Your Neighbors' Porch Day on August 8 and identifies Wellcat Holidays as created by Thomas and Ruth Roy.

National Tarantula Appreciation Day

United States / Palp Friction Tarantulas-created animal appreciation observance

National Day Archives records August 8 each year for National Tarantula Appreciation Day and identifies Palp Friction Tarantulas as the creator in 2019.

Augsburger Hohes Friedensfest (Augsburg High Peace Festival)

Augsburg, Germany / municipal public holiday

The City of Augsburg states that the Hohe Friedensfest is observed annually on 8 August as a municipal holiday applying only within Augsburg city limits, and that it is unique in Germany.

Scottish Wildcat Day

Scotland / Scottish wildcat conservation awareness observance

Action for Earth states that it founded Scottish Wildcat Day in 2016 and celebrates it every August 8; Royal Dornoch independently marked August 8 as Scottish Wildcat Day while supporting t…

International Day of the World's Indigenous Peoples

United Nations international observance

A/RES/49/214

Nagasaki Peace Memorial Ceremony

Nagasaki, Japan / atomic-bomb remembrance ceremony

Japan’s Prime Minister’s Office documents the Nagasaki Peace Memorial Ceremony on 9 August 2026, while Nagasaki’s official visitor information says the ceremony is held on 9 August every ye…

National Rice Pudding 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 Rice Pudding Day on 9 August.

National Women’s Day

South Africa / national public holiday

South Africa’s government lists National Women’s Day on 9 August and applies the statutory next-Monday rule when a public holiday falls on a Sunday; government material also describes the a…

National Day

Singapore

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Singapore — National Day on 9 August. The source verifies the diplomatic national-day ident…

Day of the Indigenous Peoples (Inheemsendag)

Suriname / national Indigenous Peoples commemoration

Suriname government messages state that Indigenous Peoples Day is celebrated on August 9 each year.

World Calligraphy Day

International calligraphy community / founder and museum context

A calligraphy museum account states that World Calligraphy Day was established in 2017 by Manuscript Pen Company with the Pen Museum and is marked on the second Wednesday of August.

Abai Day

Kazakhstan commemorative date

Government of Kazakhstan

Traditional Return of Santo Domingo de Guzmán (Managua)

Managua, Nicaragua / local patronal and cultural festivities honoring Santo Domingo de Guzmán

Current 2026 Nicaraguan coverage documents the traditional return of the image of Santo Domingo de Guzmán to Las Sierritas on 10 August; separate current reporting records 1 and 10 August a…

Primer Grito de Independencia / 10 de Agosto de 1809

Ecuador national historical commemoration

Ecuador’s Ministry of Education commemorates 10 August 1809 as the Primer Grito de Independencia, and the Ministry of Tourism holiday calendar records the national observance in Ecuador’s h…

Duran Duran Appreciation Day

Duran Duran fandom / band-recognized informal observance

Duran Duran’s own site repeatedly recognizes August 10 as Duran Duran Appreciation Day while explicitly noting that the band did not establish the day and is unsure of its origin.

National Connecticut Day

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

National Day Calendar lists National Connecticut Day on 10 August. The U.S. Senate records Connecticut’s admission/statehood date as 9 January 1788. The two dates are deliberately kept sepa…

Spoil Your Dog Day

Informal pet observance; “National” is retained as an SEO alias, not a legal-status claim

The Animal Medical Center repeatedly lists Spoil Your Dog Day on August 10 across annual pet-awareness calendars.

International Vlogging Day

International online-video creator community / Summer in the City-origin observance

Contemporary creator-industry coverage records Summer in the City founders Tom Burns and David Bullas announcing the first International Vlogging Day for 10 August 2018 and presenting it as…

World Lion Day

international lion-awareness and conservation observance

Organizer-origin observance corroborated by Government of India wildlife communications

Independence Day

Chad / national independence commemoration

A current Chadian government ministry Independence Day message identifies 11 August as the anniversary of Chad’s independence in 1960.

National Fufu Day

International / informal West African food observance

National Today and Awareness Days independently place National Fufu Day on August 11. The alias International Fufu Day is retained because other current calendars use that wording for the s…

National Raspberry Bombe Day

United States / informal dessert observance

National Today and Days Of The Year independently place National Raspberry Bombe Day on August 11 each year.

National Presidential Joke Day

United States / informal observance tied to Ronald Reagan’s 11 August 1984 microphone-check joke

National Day Calendar and National Day Archives both place the informal observance on 11 August and tie it to Ronald Reagan’s 11 August 1984 sound-check joke. The sources support the observ…

World Steelpan Day

United Nations / international observance

A/RES/77/316

International Youth Day

United Nations / international observance

A/RES/54/120

Middle Child Day

United States / informal family observance

Timeanddate lists Middle Child Day, also called National Middle Child Day, annually on August 12 across future years.

National Mother’s Day

Thailand / national important day and annual public holiday

Thailand’s Cabinet confirmed in July 2026 that 12 August every year remains National Mother’s Day, alongside the Birthday Anniversary of Queen Sirikit The Queen Mother, and remains an annua…

National Gooey Butter Cake Day

United States / Schnucks-created St. Louis food observance

Schnucks’ first-party page states that National Gooey Butter Cake Day is August 12 and that the observance was created by Schnucks; supporting observance history dates the launch to 2019.

World Elephant Day

international elephant conservation awareness observance

World Elephant Day campaign

International Left-Handers Day

Left-Handers Club / international awareness campaign

The Left-Handers Club identifies 13 August as International Left-Handers Day and says it launched the event in 1992

Turkmen Melon Day

Turkmenistan / national cultural and agricultural holiday

Turkmenistan government sources repeatedly state that Turkmen Melon Day is celebrated every year on the second Sunday of August and describe it as a national holiday.

Spirit of ’45 Day

United States / World War II generation commemoration

A U.S. congressional concurrent resolution supports observance of Spirit of ’45 Day on the second Sunday in August

Women’s Day (Tunisia) / Fête de la Femme

Tunisia / public-sector holiday and women’s-rights commemoration associated with the Personal Status Code

The Tunisian government FAQ lists Fête de la Femme on 13 August among holidays granting leave to state/public-sector personnel and cites Decree No. 2011-317; Tunisia’s Ministry of Justice s…

Anniversary of the Recovery of Oued Ed-Dahab

Morocco / national holiday calendar

Morocco’s official national-holiday page lists 14 August as the Anniversary of the Recovery of Oued Ed-Dahab.

National Financial Awareness Day

United States / financial-awareness observance repeatedly recognized by state financial regulators

Michigan DIFS identifies August 14 as National Financial Awareness Day in 2025, and Tennessee TDCI identifies Friday, August 14, 2026 as the observance date.

National Tattoo Removal Day

Tattoo-removal industry / Astanza-led observance

Astanza announced National Tattoo Removal Day for August 14 and identifies itself as an organizer of the observance.

National Navajo Code Talkers Day

Navajo Nation / commemorative observance

The Navajo Nation Office of the President and Vice President recognizes 14 August as National Navajo Code Talkers Day.

Pakistan Independence Day

Pakistan

The Ministry of Foreign Affairs publishes a 14 August 2026 Pakistan Independence Day observance.

Hari Pramuka

Indonesia

Indonesian government coverage marks Hari Pramuka on 14 August and connects it with youth character, leadership and service

Victory Day

Rhode Island, United States / state holiday

The Rhode Island Secretary of State lists Victory Day as a Rhode Island state holiday on the second Monday in August and gives 10 August for 2026.

Victory Day (Rhode Island; historically called V-J Day)

Rhode Island state holiday / World War II victory remembrance

Rhode Island Department of State material confirms offices are closed for Victory Day on Monday, 10 August 2026. The inventory phrase “VJ Day” is treated as the historical/colloquial label…

World Lizard Day

Lizard awareness and reptile-education observance

Akron Zoo states that World Lizard Day is celebrated each year on 14 August and uses the observance for reptile education.

Asunción de la Virgen

Spain / national labor-holiday framework

Spain’s national labor-holiday regulation lists 15 August as Asunción de la Virgen within the national holiday framework.

National Check the Chip Day

United States / veterinary microchip awareness observance

American Veterinary Medical Association material identifies National Check the Chip Day as August 15 every year.

Independence Day

Republic of the Congo

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Congo, Republic of — Independence Day on 15 August. This verifies the current diplomatic id…

Solemnity of the Assumption of the Blessed Virgin Mary

Catholic Church / Roman liturgical calendar

Vatican News identifies 15 August as the Solemnity of the Assumption of the Blessed Virgin Mary; the Holy See’s 2026 Angelus also marks the solemnity on 15 August.

Fundación de Panamá la Vieja / Foundation of Panama Viejo

Panama City historical and local-holiday context

Panamanian education and municipal cultural sources identify 15 August 1519 as the foundation date of Panamá la Vieja and commemorate the anniversary locally.

Founding anniversary of Asunción

Asunción, Paraguay / municipal founding anniversary

Paraguay’s Chamber of Deputies and the Municipality of Asunción mark 15 August as the city’s founding anniversary and identify 1537 as the founding year.

Independence Day

India

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists India — Independence Day on 15 August. The source verifies the diplomatic national-day iden…

National Day

Liechtenstein

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Liechtenstein — National Day on 15 August. The source verifies the diplomatic national-day…

National Acadian Day

Canadian observance celebrating Acadian culture and heritage

Government of Canada / Canadian Heritage; celebrated since 1881 and recognized in federal law in 2003

National Leathercraft Day

United States / Tandy Leather-created craft observance

Tandy Leather states that it started National Leathercraft Day in 2018 and celebrates it on August 15; National Day Calendar records the Registrar’s annual August 15 proclamation.

Lemon Meringue 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 Lemon Meringue Pie Day on 15 August.

National Liberation Day (Gwangbokjeol)

Republic of Korea / national public holiday commemorating liberation

Republic of Korea diplomatic holiday calendars list National Liberation Day on August 15, including the 2026 calendar.

National Liberation Day of Korea (Gwangbokjeol)

Republic of Korea / national holiday

Korea.net identifies 15 August as National Liberation Day (Gwangbokjeol) and describes it as an annual national commemoration.

National Shoe Donation Day

United States / DSW, DSW Foundation and Soles4Souls shoe-donation campaign

DSW/Designer Brands and Soles4Souls identify August 15 as National Shoe Donation Day; the first named observance was in 2025 and current partners continue to use the date.

Bennington Battle Day

Vermont, United States / state legal holiday and Revolutionary War commemoration

Vermont statute 1 V.S.A. §371 lists Bennington Battle Day on 16 August as a legal holiday, and the Vermont historic-preservation agency documented the 2026 commemoration.

National Airborne Day

United States military heritage observance honoring airborne forces

United States presidential proclamation, documented by the U.S. Army

National Backflow Prevention Day

Watts / backflow-prevention industry awareness campaign

Watts states that August 16 has marked National Backflow Prevention Day since 2021.

National Independent Worker Day

United States / independent-worker appreciation observance

National Day Archives records National Independent Worker Day on August 16 and attributes its creation to iPSE-U.S. in 2019; current brand recognition provides additional corroboration.

National Rum Day

Informal beverage observance documented by repeated Bacardi Limited first-party usage

Bacardi Limited first-party releases on August 16 explicitly identify the date as National Rum Day, including separate BACARDÍ and Santa Teresa brand material.

National Tell a Joke Day

United States / informal humor observance

National Day Archives states that August 16 is National Tell a Joke Day.

National Work From Home for Wellness Day

United States / NexRep-created work-from-home wellness campaign

NexRep states that National Work from Home for Wellness Day is celebrated annually on August 16 and that NexRep established it.

Feast of St. Roch

Catholic / saint commemoration

Vatican News’ calendar of saints lists St. Roch, Pilgrim, on August 16.

Black Cat Appreciation Day

United States / animal-welfare and adoption-awareness observance

UPI reports that Wayne H. Morris started Black Cat Appreciation Day in 2011 and gives the date as August 17; ASPCA independently recognizes August 17 as the observance date.

Fête nationale / Independence anniversary of Gabon

Gabon / national independence observance

The Presidency of Gabon documented the country’s national celebration on 17 August 2026 as the 66th anniversary of accession to international sovereignty.

Independence Day / Proclamation anniversary

Indonesia

Indonesia’s State Secretariat announced the 2026 Independence Month agenda and 17 August 2026 ceremony for the 81st anniversary of the Proclamation of Independence.

National Massachusetts Day

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

National Day Calendar lists National Massachusetts Day on 17 August. The U.S. Senate records Massachusetts’s admission/statehood date as 6 February 1788. The two dates are deliberately kept…

National Workers’ Comp Adjuster Day

United States / Centre for Neuro Skills-created professional appreciation observance

National Day Archives records August 17 of each calendar year and identifies the Centre for Neuro Skills as the creator in July 2021.

Paso a la Inmortalidad del General José de San Martín

Argentina national commemoration

Government of Argentina

Unification of Prekmurje Slovenes with the Mother Nation

Slovenia / national holiday that is not work-free

Slovenia’s government lists 17 August as Unification of Prekmurje Slovenes with the Mother Nation and explicitly identifies it among national holidays that are not work-free days.

Bad Poetry Day

United States / creator-defined informal Wellcat arts observance

The first-party Wellcat Holidays calendar lists Bad Poetry Day on August 18 and identifies the collection as created by Thomas and Ruth Roy.

Constitution Day of the Republic of Indonesia

Indonesia / civic commemoration

Indonesian government statistical-agency pages identify 18 August as Constitution Day of the Republic of Indonesia and describe it as an annual commemoration.

Long Tan Day (historical name; now Vietnam Veterans’ Day)

Australian remembrance observance; “Long Tan Day” is the historical name now officially observed as Vietnam Veterans’ Day

Australian Government Department of Veterans’ Affairs

National Couples Day

United States / informal relationship observance

National Today and Days Of The Year independently place National Couples Day / National Couple’s Day on August 18 each year.

National Ice Cream Pie Day

United States / informal food observance

National Day Calendar and National Today independently place National Ice Cream Pie Day on August 18 each year.

National Soft Serve Ice Cream 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 Soft Serve Ice Cream Day on 18 August.

World Breast Cancer Research Day

International breast-cancer research awareness campaign

The World Breast Cancer Research Day campaign identifies 18 August as World Breast Cancer Research Day; New York State’s Department of Health also describes it as observed every August 18.

Independence Day

Afghanistan

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Afghanistan — Independence Day on 19 August. The source verifies the diplomatic national-da…

International Geocaching Day

global geocaching community and outdoor-exploration observance

Geocaching HQ

International Homeless Animals’ Day®

International / International Society for Animal Rights campaign

ISAR states it created International Homeless Animals’ Day in 1992 and observes it annually on the third Saturday in August; the 2026 date is August 15.

International Orangutan Day

Orangutan conservation community / international awareness

Orangutan Foundation identifies International Orangutan Day on August 19 and uses the date for orangutan conservation awareness

National Aviation Day

United States patriotic and national observance

United States Code, title 36 §118

National Patient Advocacy Day

United States / patient-advocacy awareness campaign; current calendar identifies Ardelyx sponsorship

Current National Patient Advocacy Day coverage places the observance on August 19 every year and identifies Ardelyx as sponsor, while preserving earlier advocacy-history context.

World Photography Day

WorldPhotographyDay.com / global organizer campaign

The event organizer describes World Photography Day as an annual worldwide celebration on 19 August and confirms Wednesday, 19 August 2026.

National Potato Day

United States / informal food and agriculture observance

Potatoes USA’s retail toolkit identifies August 19 as National Potato Day, and USDA NIFA’s August 2025 outreach calendar independently lists National Potato Day on August 19.

Anniversary of Vietnam’s August Revolution

Vietnam national historical commemoration

Vietnam News Agency’s current 2026 coverage explicitly marks 19 August 2026 as the 81st anniversary of the August Revolution of 19 August 1945.

World Humanitarian Day

United Nations / international observance

A/RES/63/139

Anniversary of the Revolution of the King and the People

Morocco / national holiday calendar

Morocco’s official national-holiday page lists 20 August as the Anniversary of the Revolution of the King and the People; royal materials provide the national historical framing.

National Bacon Lovers Day

United States and wider informal food observance

National Day Calendar and National Today independently place National Bacon Lovers Day on August 20 each year.

National Chocolate Pecan 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 Chocolate Pecan Pie Day on 20 August.

National Lemonade Day

United States / informal food observance with repeated first-party corporate/brand usage

Milo’s 2026 National Lemonade Day giveaway begins on August 20, and Lowe’s independently used August 20 for National Lemonade Day in 2020.

National Radio Day

United States / unofficial radio appreciation observance acknowledged by Smithsonian institutions

Smithsonian Institution Archives and Smithsonian Libraries both recognize National Radio Day on August 20, providing strong institutional corroboration for the date while not establishing a…

20 August — celebration of the founding of the State / Saint Stephen’s Day

Hungary / national and official state holiday

Hungary’s diplomatic service identifies 20 August as the national holiday and official state holiday commemorating the foundation of the state and King Stephen I (Saint Stephen).

World Mosquito Day

mosquito-borne disease history and awareness observance

London School of Hygiene & Tropical Medicine historical-source verification

International Day for Underwater Cultural Heritage

UNESCO international day

Proclaimed at UNESCO’s 43rd General Conference (2025)

International Day of Remembrance and Tribute to the Victims of Terrorism

United Nations / international observance

A/RES/72/165

National Report Upcoding Fraud Day

United States / Hesch Firm fraud-reporting awareness campaign

National Day Archives records August 21 and identifies The Hesch Firm / Joel D. Hesch as the creator of the 2017 upcoding-fraud awareness day.

Ninoy Aquino Day

Philippines — special nonworking holiday under Republic Act No. 9256

Republic Act No. 9256

Be an Angel Day

Informal kindness/service observance attributed to Jayne Howard Feldman

Covenant House states that Be an Angel Day is celebrated annually on 22 August and was created by Jayne Howard Feldman in 1993; Punchbowl independently gives the same date, creator and 1993…

International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief

United Nations / international observance

A/RES/73/296

National Surgical Oncologist Day

United States / professional-appreciation observance founded in 2019 by Jenni Cherlin and Lean On Me Breast Cancer Network

National Day Calendar’s proclamation record identifies the founders and establishes August 22 as the annual observance date; the Society of Surgical Oncology has also recognized the day.

National Take Your Cat to the Vet Day

United States / feline veterinary-care awareness campaign

American Association of Feline Practitioners material identifies National Take Your Cat to the Vet Day on August 22 and provides campaign resources for veterinary practices.

Day of the State Flag of the Russian Federation

Russia / national civic observance

Russia’s EMERCOM states that the Day of the State Flag of the Russian Federation is celebrated annually on 22 August and traces the observance to a 1994 presidential decree.

World Plant Milk Day

Global / World Plant Milk Day campaign

The World Plant Milk Day campaign identifies 22 August as its annual date, while ProVeg documents the campaign’s 2017 launch with Plant Based News.

International Day for the Remembrance of the Slave Trade and Its Abolition

UNESCO / international observance

UNESCO 29 C/Resolution 40

European Day of Remembrance for Victims of Stalinism and Nazism

European Union / European remembrance observance

The European Parliament’s 2008 declaration called for 23 August to be proclaimed the European Day of Remembrance for Victims of Stalinism and Nazism, and later Parliament material continues…

Health Unit Coordinator Day / Health Unit Coordinator Recognition Week

National Association of Health Unit Coordinators / professional recognition

NAHUC states that 23 August has been recognized as Health Unit Coordinator Day and that beginning in 2017 the association expanded recognition to the full week of 23–29 August.

National Cuban Sandwich Day

United States / informal food observance associated with a Tampa journalism experiment

Current calendar evidence consistently uses August 23; National Day Calendar documents the modern observance as an intentionally created informal food day rather than an official Cuban or g…

National Ride The Wind Day

United States / informal aviation-history and recreation observance

National Day Calendar and National Today independently place National Ride The Wind Day on August 23 each year.

National Space Day

India

ISRO states that 23 August was declared National Space Day to commemorate Chandrayaan-3’s successful lunar landing and marked the third National Space Day in 2026

National Sponge 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 Sponge Cake Day on 23 August.

International Strange Music Day

International / creator-led music observance

Creator Patrick Grant’s own site identifies International Strange Music Day as August 24 and continues to publish annual observance entries, including the 28th annual event in 2026.

National Flag Day

Liberia / national flag holiday

Liberia’s Ministry of Foreign Affairs states that the Flag Day Act set aside August 24 of each year as National Flag Day and a national holiday.

National Peach 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 Peach Pie Day on 24 August.

National SKAM Artist Day

United States / SKAM Artist-created entertainment observance

National Day Archives records August 24 as National SKAM Artist Day and identifies SKAM Artist as the 2020 founder; current annual calendars preserve August 24.

National Waffle Day

United States / informal observance tied to the August 24, 1869 U.S. waffle-iron patent anniversary

Smithsonian sources identify August 24 as National Waffle Day and connect the date with Cornelius Swarthout’s 1869 U.S. waffle-iron patent.

Independence Day of Ukraine

Ukraine

A 2026 Ukrainian state-administration page states that 24 August has been Ukraine’s official Independence Day and main public holiday.

National Banana Split Day

United States / informal food observance

National Day Calendar identifies August 25 as National Banana Split Day and explicitly leaves the observance founder unidentified.

National Park Service Founders Day

United States / National Park Service anniversary

The National Park Service identifies 25 August 1916 as the date of the Organic Act creating the agency and recognizes 25 August as Founders Day.

Whiskey Sour 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 Whiskey Sour Day on 25 August.

Independence Day

Uruguay

Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Uruguay — Independence Day on 25 August. The source verifies the diplomatic national-day id…

National Cherry Popsicle 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 Cherry Popsicle Day on 26 August.

National Day of Repentance

Papua New Guinea / national public holiday and day of prayer/repentance

Papua New Guinea government calendars list National Day of Repentance on 26 August, including the 2026 and 2027 public-holiday schedules.

National Dog Day

United States-origin / creator-led animal-welfare observance

Founder Colleen Paige’s current holiday list identifies National Dog Day on August 26; the National Dog Day site describes the annual observance and its founding.

Women’s Equality Day

United States / presidential commemoration

A current Presidential message dated 26 August 2025 recognizes Women’s Equality Day and ties the observance to the certification of the Nineteenth Amendment on 26 August 1920.

Lyndon Baines Johnson Day

Texas, United States / state holiday

Texas Government Code §662.003 lists 27 August, Lyndon Baines Johnson Day, among state holidays.

Independence Day of the Republic of Moldova

Republic of Moldova / national independence observance

The Government of Moldova states that the Republic marks Independence Day on 27 August and that Moldova proclaimed independence on 27 August 1991; the 2026 programme marked the 35th anniver…

National Just Because Day

United States / informal fun observance

Independent observance calendars identify August 27 as the annual date of National Just Because Day.

Social Justice Sunday

Australia / Catholic social-justice observance

The Australian Catholic social-justice office states that since 2020 Social Justice Sunday is celebrated on the last Sunday in August; earlier editions used the last Sunday in September.

World Lake Day

United Nations / international observance

A/RES/79/142

Emirati Women’s Day

United Arab Emirates / national recognition observance

The UAE government states Emirati Women’s Day is observed annually on 28 August; federal ministry pages list the 2026 observance on that date.

Summer Bank Holiday (England and Wales)

England and Wales bank holiday; source title is “Summer bank holiday”

GOV.UK

National Cherry Turnover 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 Cherry Turnover Day on 28 August.

National Heroes Day of Philippines

Philippines

Rainbow Bridge Remembrance Day

International / pet-loss remembrance observance founded by Deborah Barnes

Founder Deborah Barnes documents creating Rainbow Bridge Remembrance Day in 2015 in memory of her cat Mr. Jazz and observing it every August 28.

International Day against Nuclear Tests

United Nations / international observance

A/RES/64/35

Lemon Juice 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 Lemon Juice Day on 29 August.

National Sports Day (India)

India / national sports commemoration

Government of India sources state that National Sports Day is celebrated every year on 29 August in honour of hockey legend Major Dhyan Chand; the 2026 campaign also centers the 29 August b…

International Day of the Victims of Enforced Disappearances

United Nations / international observance

A/RES/65/209

International Whale Shark Day

International / whale-shark conservation awareness

Wildlife Trust of India’s 2026 observance page states that International Whale Shark Day is marked every year on 30 August and documents its own continuing participation.

La Tomatina

Buñol municipal festival, Spain

Ajuntament de Buñol / municipal tourism authority

National Grief Awareness Day

United States / grief-awareness observance founded by Angie Cartwright in 2014

Multiple local-government records recognize August 30 as National Grief Awareness Day and identify Angie Cartwright as its 2014 founder.

National Holistic Pet Day

United States / holistic pet-care awareness observance attributed to Colleen Paige

Holistic Select recognizes National Holistic Pet Day and attributes its origin to animal advocate Colleen Paige; current observance references use August 30.

Popular Consultation Day

Timor-Leste national public holiday and commemorative day

Government of Timor-Leste

Slinky Day

United States / toy-brand and pop-culture observance

Just Play launched a National Slinky Day brand campaign on August 30, 2021, and Checkiday independently lists Slinky Day annually on August 30.

August 30 Victory Day

Türkiye / national commemoration

The Republic of Türkiye Ministry of Foreign Affairs publishes presidential messages for August 30 Victory Day and identifies August 30 with the decisive 1922 victory in the War of Independe…

Birth Anniversary of President Ramon Magsaysay

Zambales, Philippines / provincial statutory holiday and national historical commemoration

Republic Act No. 7792 declares 31 August each year a special nonworking public holiday in the Province of Zambales to commemorate former President Ramon Magsaysay’s birth anniversary; curre…

Eat Outside 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 Eat Outside Day on 31 August.

International Day for People of African Descent

United Nations / international observance

A/RES/75/170

International Overdose Awareness Day

Global campaign led by Penington Institute

Independence Day

Kyrgyz Republic

The current agency news register records “Happy Independence Day of the Kyrgyz Republic!” on 31 August 2026.

Malaysia Independence Day / Hari Kemerdekaan

Malaysia

Tourism Malaysia identifies 31 August as Malaysia Independence Day, locally Hari Kemerdekaan.

National Burger Day

United Kingdom / informal burger-food observance

EventGuide and Discover Events independently describe the UK National Burger Day as the last Thursday in August.

National Diatomaceous Earth Day

United States / EP Minerals-created diatomaceous-earth observance

EP Minerals states that it founded National Diatomaceous Earth Day, that National Day Calendar approved the day in 2016, and that the observance is on August 31.

National South Carolina Day

United States / National Day Calendar National State Days series — South Carolina

National Day Calendar lists National South Carolina Day on 31 August. The U.S. Senate records South Carolina’s admission/statehood date as 23 May 1788. These are separate facts: the calenda…

Trinidad and Tobago Independence Day

Trinidad and Tobago

The Organization of American States’ current country page lists Trinidad and Tobago National Independence Day as 31 August.

World Distance Learning Day

International informal education observance recognized by universities and education institutions

Georgia State University, LSU and other education institutions identify August 31 as World Distance Learning Day, supporting a stable recurring date while not implying a UN designation.