August part of Gregorian calendar
Fixed Gregorian observances
Season of Emancipation (Barbados) (April 14 to August 23)
International Clown Week (August 1–7)
World Breastfeeding Week (August 1–7)
August 1
Armed Forces Day (China)
Armed Forces Day (Lebanon)
Azerbaijani Language and Alphabet Day (Azerbaijan)
Emancipation Day (Barbados, Guyana, Jamaica, Saint Vincent and the Grenadines, St. Lucia, Trinidad and Tobago, Turks and Caicos Islands)
Imbolc (Neopaganism, Southern Hemisphere only)
Lammas (England, Scotland, Neopaganism, Northern Hemisphere only)
Lughnasadh (Gaels, Ireland, Scotland, Neopaganism, Northern Hemisphere only)
Minden Day (United Kingdom)
National Day (Benin)
National Milkshake Day (United States)
Official Birthday and Coronation Day of the King of Tonga (Tonga)
Pachamama Raymi (Quechua people in Ecuador and Peru)
Parents' Day (Democratic Republic of the Congo)
Procession of the Cross and the beginning of Dormition Fast (Eastern Orthodoxy)
Statehood Day (Colorado)
Swiss National Day (Switzerland)
Victory Day (Cambodia, Laos, Vietnam)
World Scout Scarf Day
Yorkshire Day (Yorkshire, England)
August 2
Airmobile Forces Day (Ukraine)
Day of Azerbaijani cinema (Azerbaijan)
Our Lady of the Angels Day (Costa Rica)
Paratroopers Day (Russia)
Republic Day (North Macedonia)
August 3
Anniversary of the Killing of Pidjiguiti (Guinea-Bissau)
Armed Forces Day (Equatorial Guinea)
Esther Day (United States)
Flag Day (Venezuela)
Independence Day (Niger)
Arbor Day (Niger)
National Guard Day (Venezuela)
National Watermelon Day (United States)
National White Wine Day (United States)
August 4
Coast Guard Day (United States)
Constitution Day (Cook Islands)
Matica slovenská Day (Slovakia)
Revolution Day (Burkina Faso)
August 5
Dedication of the Basilica of St Mary Major (Catholic Church)
Independence Day (Burkina Faso)
National Underwear Day (United States)
Victory and Homeland Thanksgiving Day and the Day of Croatian defenders (Croatia)
August 6
Feast of the Transfiguration
Sheikh Zayed bin Sultan Al Nahyan's Accession Day. (United Arab Emirates)
Hiroshima Peace Memorial Ceremony (Hiroshima, Japan)
Independence Day (Bolivia)
Independence Day (Jamaica)
Russian Railway Troops Day (Russia)
August 7
Assyrian Martyrs Day (Assyrian community)
Battle of Boyacá Day (Colombia)
Emancipation Day (Saint Kitts and Nevis)
Independence Day (Ivory Coast)
Republic Day (Ivory Coast)
Youth Day (Kiribati)
August 8
Ceasefire Day (Iraqi Kurdistan)
Father's Day (Taiwan)
Happiness Happens Day (International observance)
International Cat Day
Namesday of Queen Silvia of Sweden, (Sweden)
Nane Nane Day (Tanzania)
Signal Troops Day (Ukraine)
August 9
Battle of Gangut Day (Russia)
International Day of the World's Indigenous People (United Nations)
National Day (Singapore)
National Women's Day (South Africa)
Remembrance for Radbod, King of the Frisians (The Troth)
August 10
Argentine Air Force Day (Argentina)
Constitution Day (Anguilla)
Declaration of Independence of Quito (Ecuador)
International Biodiesel Day
National S'more Day (United States)
August 11
Flag Day (Pakistan)
Independence Day (Chad)
Mountain Day (Japan)
August 12
Glorious Twelfth (United Kingdom)
HM the Queen's Birthday and National Mother's Day (Thailand)
International Youth Day (United Nations)
Russian Railway Troops Day (Russia)
Sea Org Day (Scientology)
World Elephant Day
August 13
Independence Day (Central African Republic)
International Lefthanders Day
National Filet Mignon Day (United States)
Women's Day (Tunisia)
August 14
Anniversary Day (Tristan da Cunha)
Commemoration of Wadi al-Dahab (Morocco)
Day of the Defenders of the Fatherland (Abkhazia)
Engineer's Day (Dominican Republic)
Falklands Day (Falkland Islands)
Independence Day (Pakistan)
National Creamsicle Day (United States)
Pramuka Day (Indonesia)
August 15
Feast Day of the Assumption of Mary (Catholic holy days of obligation, a public holiday in many countries.
Ferragosto (Italy)
Māras (Latvia)
Mother's Day (Antwerp and Costa Rica)
National Acadian Day (Acadians)
Virgin of Candelaria, patron of the Canary Islands. (Tenerife, Spain)
Feast of the Dormition of the Theotokos (Eastern Orthodox, Oriental Orthodox and Eastern Catholic Churches)
Navy Day (Romania)
Armed Forces Day (Poland)**The first day of Flooding of the Nile, or Wafaa El-Nil (Egypt and Coptic Church)
The main day of Bon Festival (Japan), and its related observances:
Awa Dance Festival (Tokushima Prefecture)
Constitution Day (Equatorial Guinea)
End-of-war Memorial Day, when the National Memorial Service for War Dead is held. (Japan)
Founding of Asunción (Paraguay)
Independence Day (Korea)
Gwangbokjeol (South Korea)
Jogukhaebangui nal, "Fatherland Liberation Day" (North Korea)
Independence Day (India)
Independence Day (Republic of the Congo)
National Day (Liechtenstein)
National Mourning Day (Bangladesh)
Victory over Japan Day (United Kingdom)
National Lemon Meringue Pie Day (United States)
August 16
Bennington Battle Day (Vermont, United States)
Children's Day (Paraguay)
Gozan no Okuribi (Kyoto, Japan)
The first day of the Independence Days (Gabon)
National Airborne Day (United States)
National Rum Day (United States)
Restoration Day (Dominican Republic)
August 17
The Birthday of Marcus Garvey (Rastafari)
Engineer's Day (Colombia)
Flag Day (Bolivia)
Independence Day (Indonesia)
Independence Days (Gabon)
National Vanilla Custard Day (United States)
Prekmurje Union Day (Slovenia)
San Martin Day (Argentina)
August 18
Arbor Day (Pakistan)
Armed Forces Day (North Macedonia)
Bad Poetry Day
Birthday of Virginia Dare (Roanoke Island)
Constitution Day (Indonesia)
Long Tan Day (Australia)
National Science Day (Thailand)
August 19
Feast of the Transfiguration (Julian calendar), and its related observances:
Buhe (Ethiopian Orthodox Tewahedo Church)
Saviour's Transfiguration, popularly known as the "Apples Feast" (Russian Orthodox Church and Georgian Orthodox Church)
Afghan Independence Day (Afghanistan)
August Revolution Commemoration Day (Vietnam)
Birthday of Crown Princess Mette-Marit (Norway)
Manuel Luis Quezón Day (Quezon City and other places in The Philippines named after Manuel L. Quezon)
National Aviation Day (United States)
National Potato Day (United States)
World Humanitarian Day
August 20
Indian Akshay Urja Day (India)
Restoration of Independence Day (Estonia)
Revolution of the King and People (Morocco)
Saint Stephen's Day (Hungary)
World Mosquito Day
August 21
Ninoy Aquino Day (Philippines)
Youth Day/King Mohammed VI's Birthday (Morocco)
August 22
Feast of the Coronation of Mary
Flag Day (Russia)
Madras Day (Chennai and Tamil Nadu, India)
National Eat a Peach Day (United States)
National Pecan Torte Day (United States)
Southern Hemisphere Hoodie-Hoo Day (Chase's Calendar of Events, Southern Hemisphere)
August 23
Battle of Kursk Day (Russia)
Day of the National Flag (Ukraine)
European Day of Remembrance for Victims of Stalinism and Nazism or Black Ribbon Day (European Union and other countries), and related observances:
Liberation from Fascist Occupation Day (Romania)
International Day for the Remembrance of the Slave Trade and its Abolition
Umhlanga Day (Eswatini)
August 24
Flag Day (Liberia)
Independence Day of Ukraine
International Strange Music Day
National Waffle Day (United States)
Nostalgia Night (Uruguay)
Willka Raymi (Cusco, Peru)
August 25
Day of Songun (North Korea)
Independence Day (Uruguay)
Liberation Day (France)
National Banana Split Day (United States)
National Whiskey Sour Day (United States)
Soldier's Day (Brazil)
August 26
Herero Day (Namibia)
Heroes' Day (Namibia)
Repentance Day (Papua New Guinea)
Women's Equality Day (United States)
August 27
Film and Movies Day (Russia)
Independence Day (Republic of Moldova)
Lyndon Baines Johnson Day (Texas, United States)
National Banana Lovers Day (United States)
National Pots De Creme Day (United States)
August 28
Assumption of Mary (Eastern Orthodox Church (Public holiday in North Macedonia, Serbia, and Georgia (country))
Crackers of the Keyboard Day
Race Your Mouse Around the Icons Day
National Cherry Turnover Day (United States)
August 29
International Day against Nuclear Tests
Miners' Day (Ukraine)
More Herbs, Less Salt Day
National Lemon Juice Day (United States)
National Chop Suey Day (United States)
National Sports Day (India)
Slovak National Uprising Anniversary (Slovakia)
Telugu Language Day (India)
August 30
Constitution Day (Kazakhstan)
Constitution Day  (Turks and Caicos Islands)
Independence Day (Tatarstan, Russia, unrecognized)
International Day of the Disappeared (International)
Popular Consultation Day (East Timor)
Saint Rose of Lima's Day (Peru)
Victory Day (Turkey)
August 31
Baloch-Pakhtun Unity Day (Balochs and Pashtuns, International observance)
Day of Solidarity and Freedom (Poland)
Independence Day (Federation of Malaya, Malaysia)
Independence Day (Kyrgyzstan)
Independence Day (Trinidad and Tobago)
Love Litigating Lawyers Day
National Language Day (Moldova)
National Trail Mix Day (United States)
North Borneo Self-government Day (Sabah, Borneo)
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