2025
First observance
National Shoe Donation Day
A contemporaneous DSW back-to-school interview stated that DSW would celebrate its first National Shoe Donation Day on August 15.
Evergreen date guide
What is celebrated on August 15?
See the observances and verified observance-history milestones attached to August 15. Each observance keeps its own source and date details.
Verified history
Today in history →On this date in observance history
Selected observance milestones connected to this date, based on reviewed sources.
2018
First observance
National Leathercraft Day
National Day Calendar records that Tandy Leather created National Leathercraft Day on August 15, 2018, and Tandy confirms the observance started in 2018 on August 15.
2013
First observance
National Check the Chip Day
AAHA says the organizations launched the day in 2013 and current materials identify August 15 as its annual date.
1940
First observance
National Day
Current government material says National Day was first observed in 1940.
1881
First observance
National Acadian Day
The Act’s preamble says August 15 has been the day Acadians celebrate National Acadian Day since 1881.
Reviewed depth
Other in-depth guides on August 15
Source-backedFixed AnnualIn-depth guide
Asunción de la Virgen
Spain’s national labor-holiday regulation lists 15 August as Asunción de la Virgen within the national holiday framework.
Source-backedFixed AnnualIn-depth guide
Founding anniversary of Asunción
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.
Source-backedFixed AnnualIn-depth guide
Fundación de Panamá la Vieja / Foundation of Panama Viejo
Panama’s Law 14 of 20 January 1955 recognizes 15 August 1519 as the foundation date of Panama City and declares 15 August each year a holiday for the District of Panama; municipal and herit…
Source-backedFixed AnnualIn-depth guide
Independence Day
Republic of the Congo laws directly list August 15 as the national holiday, including Law No. 19-2010, which adopts August 15 of every year in commemoration of the proclamation of independe…
Source-backedFixed AnnualIn-depth guide
Independence Day
The Indian Independence Act 1947 establishes the August 15, 1947 constitutional transition, while current Government of India sources independently verify annual August 15 Independence Day…
Source-backedRule Based AnnualIn-depth guide
International Geocaching Day
Geocaching HQ first-party history identifies August 20, 2011 as the first International Geocaching Day and states that it is now celebrated every third Saturday in August. Current official…
Explore the mix
All topics →Topics represented on August 15
14 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Asunción de la Virgen
Spain’s national labor-holiday regulation lists 15 August as Asunción de la Virgen within the national holiday framework.
Source-backedFixed AnnualIn-depth guide
Founding anniversary of Asunción
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.
Source-backedFixed AnnualIn-depth guide
Fundación de Panamá la Vieja / Foundation of Panama Viejo
Panama’s Law 14 of 20 January 1955 recognizes 15 August 1519 as the foundation date of Panama City and declares 15 August each year a holiday for the District of Panama; municipal and herit…
Source-backedFixed AnnualIn-depth guide
Independence Day
Republic of the Congo laws directly list August 15 as the national holiday, including Law No. 19-2010, which adopts August 15 of every year in commemoration of the proclamation of independe…
Source-backedFixed AnnualIn-depth guide
Independence Day
The Indian Independence Act 1947 establishes the August 15, 1947 constitutional transition, while current Government of India sources independently verify annual August 15 Independence Day…
Source-backedRule Based AnnualIn-depth guide
International Geocaching Day
Geocaching HQ first-party history identifies August 20, 2011 as the first International Geocaching Day and states that it is now celebrated every third Saturday in August. Current official…
Source-backedRule Based AnnualIn-depth guide
International Homeless Animals’ Day®
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.
Source-backedFixed AnnualIn-depth guide
National Acadian Day
Government of Canada / Canadian Heritage; celebrated since 1881 and recognized in federal law in 2003
Source-backedFixed AnnualIn-depth guide
National Check the Chip Day
AAHA states that it and AVMA launched Check the Chip Day in 2013; AVMA and AAHA materials identify August 15 as the annual recurrence and focus on current microchip registry contact informa…
Source-backedFixed AnnualIn-depth guide
National Day
Liechtenstein government material identifies National Day on 15 August, says the Government introduced it in 1940, and explains that the date combined the Feast of the Assumption with the e…
Source-backedFixed AnnualIn-depth guide
National Leathercraft Day
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.
Source-backedFixed AnnualIn-depth guide
National Liberation Day of Korea (Gwangbokjeol)
Korea.net identifies 15 August as National Liberation Day (Gwangbokjeol) and describes it as an annual national commemoration.
Source-backedFixed AnnualIn-depth guide
National Shoe Donation Day
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.
Source-backedFixed AnnualIn-depth guide
Solemnity of the Assumption of the Blessed Virgin Mary
Vatican sources identify August 15 as the Solemnity of the Assumption, document an established August 15 celebration by the fifth century, and distinguish that ancient feast from Pope Pius…
How dates are selected
This page combines fixed annual dates, reusable calendar rules and year-specific dates confirmed for 2026. Variable or historical dates are included only when they are clearly supported.
Read the methodology →