| Aug 1Tue | Lughnasadh (Lammas)Religion · Pagan and Wiccan | – | annual | Wheel of the YearComputed (rule) | in 2 yr |
| Tisha B’AvReligion · Judaism | – | annual | HebcalComputed (rule) | in 2 yr |
| Aug 3Thu | Mawlid an-NabiTentativeReligion · Islam | – | annual | Umm al-Qura calendarComputed (rule) | in 2 yr |
| Prophet Muhammad's Birthday (Tentative Date) (Egypt)Holidays · Egypt · Egypt | Egypt | annual | Nager.Date | in 2 yr |
| 125th anniversary: Macedonian rebels in Kruševo established a republicHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 4Fri | MN DNR: Surplus bear licenses availableOutdoors · Hunting · 2029 | 2029 | annual | Minnesota DNR | in 2 yr |
| 75th anniversary: Alfred C. Glassell Jr. caught a black marlin weighing 1,560 lb (710 kg)...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 5Sat | Raksha BandhanTentativeReligion · Hinduism | – | annual | WikipediaComputed (rule) | in 2 yr |
| Full moon: Sturgeon MoonSky · Moon phases · 3:10 am CT | – | monthly | NASAComputed (rule) | in 2 yr |
| Marine Le Pen, born 1968 (60 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 6Sun | Andy Warhol, born 1928 (100 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day of Awareness of the Special Development Needs and Challenges of Landlocked Developing CountriesObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 7Mon | August Holiday (Ireland)Holidays · Ireland · Ireland | Ireland | annual | Nager.Date | in 2 yr |
| Aug 9Wed | National Women's Day (South Africa)Holidays · South Africa · South Africa | South Africa | annual | Nager.Date | in 2 yr |
| Gillian Anderson, born 1968 (60 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Leonid Kuchma, born 1938 (90 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day of the World's Indigenous PeoplesObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 10Thu | Venus at greatest western elongationSky · Planets | – | recurring | Astronomy EngineComputed (rule) | in 2 yr |
| 400th anniversary: The Swedish warship Vasa sank shortly after departing Stockholm on her maiden...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 75th anniversary: First Indochina War: The French Union withdrew its forces from Operation...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 11Fri | Mountain Day (Japan)Holidays · Japan · Japan | Japan | annual | Nager.Date | in 2 yr |
| Hulk Hogan, born 1953 (75 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| World Steelpan DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 12Sat | Perseids meteor shower peakSky · Meteor showers | – | annual | International Meteor OrganizationComputed (rule) | in 2 yr |
| International Youth DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 13Sun | Krishna JanmashtamiTentativeReligion · Hinduism | – | annual | WikipediaComputed (rule) | in 2 yr |
| ObonReligion · Buddhism · to Aug 16 | – | annual | WikipediaComputed (rule) | in 2 yr |
| Last quarter moonSky · Moon phases · 6:45 am CT | – | monthly | NASAComputed (rule) | in 2 yr |
| Aug 15Tue | 2028 Summer ParalympicsSports · Olympics · to Aug 27 · Los Angeles | Los Angeles | every few years | Wikipedia | in 2 yr |
| Assumption of MaryReligion · Christianity | – | annual | USCCB liturgical yearComputed (rule) | in 2 yr |
| Assumption (Spain)Holidays · Spain · Spain | Spain | annual | Nager.Date | in 2 yr |
| Assumption Day (France)Holidays · France · France | France | annual | Nager.Date | in 2 yr |
| Assumption Day (Italy)Holidays · Italy · Italy | Italy | annual | Nager.Date | in 2 yr |
| Assumption Day (Poland)Holidays · Poland · Poland | Poland | annual | Nager.Date | in 2 yr |
| Liberation Day (South Korea)Holidays · South Korea · South Korea | South Korea | annual | Nager.Date | in 2 yr |
| Aug 16Wed | Madonna, born 1958 (70 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 17Thu | Herta Müller, born 1953 (75 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 18Fri | MN DNR: Prairie chicken hunt application deadlineOutdoors · Hunting · 2029 | 2029 | annual | Minnesota DNR | in 2 yr |
| Aug 19Sat | 25th anniversary: A car bomb destroyed the United Nations headquarters at Baghdad's Canal HotelHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 25th anniversary: A Hamas suicide bomber killed 23 people and wounded more than 130 others,...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| World Humanitarian DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 20Sun | New moonSky · Moon phases · 5:44 am CT | – | monthly | NASAComputed (rule) | in 2 yr |
| Aug 21Mon | General José de San Martín Memorial Day (Argentina)Holidays · Argentina · Argentina | Argentina | annual | Nager.Date | in 2 yr |
| International Day of Remembrance and Tribute to the Victims of TerrorismObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 22Tue | 25th anniversary: Roy Moore, Alabama's chief justice, was suspended after refusing to comply with...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day Commemorating the Victims of Acts of Violence Based on Religion or BeliefObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 23Wed | Ganesh ChaturthiTentativeReligion · Hinduism · to Sep 2 | – | annual | WikipediaComputed (rule) | in 2 yr |
| Kobe Bryant, born 1978 (50 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day for the Remembrance of the Slave Trade and Its AbolitionObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 24Thu | Minnesota State Fair 2028Culture · Minnesota · to Sep 4 · State Fairgrounds, Falcon Heights | State Fairgrounds, Falcon Heights | annual | Minnesota State FairComputed (rule) | in 2 yr |
| Independence Day (Ukraine)Holidays · Ukraine · Ukraine | Ukraine | annual | Nager.Date | in 2 yr |
| Sauli Niinistö, born 1948 (80 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 25Fri | Tim Burton, born 1958 (70 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| Aug 26Sat | 100th anniversary: At a cafe in Paisley, Scotland, a woman found the remains of a snail in her...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 50th anniversary: A conclave elected Albino Luciani as Pope John Paul I, succeeding Paul VIHistory · Anniversaries | – | annual | Wikipedia | in 2 yr |
| First quarter moonSky · Moon phases · 8:36 pm CT | – | monthly | NASAComputed (rule) | in 2 yr |
| Qixi FestivalCulture · Lunar calendar festivals | – | annual | Hong Kong ObservatoryComputed (rule) | in 2 yr |
| Aug 27Sun | World Lake DayObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 28Mon | Dormition of the Theotokos (Julian calendar)Religion · Orthodox Christianity | – | annual | Orthodox Church in AmericaComputed (rule) | in 2 yr |
| Aug 29Tue | Michael Jackson, born 1958 (70 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| 125th anniversary: Slava (pictured), the last of five Borodino-class battleships, was launched by...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| 125th anniversary: Slava, the last of five Borodino-class battleships, was launched by the...History · Anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day against Nuclear TestsObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 30Wed | Anna Politkovskaya, born 1958 (70 years)People · Birth anniversaries | – | annual | Wikipedia | in 2 yr |
| International Day of the Victims of Enforced DisappearancesObservances · UN international days | – | annual | United Nations | in 2 yr |
| Aug 31Thu | International Day for People of African DescentObservances · UN international days | – | annual | United Nations | in 2 yr |
