2020
Evergreen date guide
What is celebrated on August 4?
See the observances and verified observance-history milestones attached to August 4. 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.
2020
Institutional decision
National Couscous Day
Ainsley Harriott’s official news archive dates the National Couscous Day launch item to August 4, 2020.
2018
First observance
International Clouded Leopard Day
The Aspinall Foundation states that it hosted the first ever International Clouded Leopard Day at Howletts on 4 August 2018.
2011
First observance
National IPA Day
Founder launch material and contemporary craft-beer event accounts document the inaugural edition.
1966
Institutional decision
National Day
The National Archives dates the final naming press statement to August 4, 1966.
1964
Institutional decision
Independence Day
Republic Act No. 4166 states that it was approved on August 4, 1964.
1964
Later action
Independence Day
Changed Philippine Independence Day from July 4 to June 12 and designated July 4 as Philippine Republic Day.
1964
Institutional decision
Republic Day (Philippines; July 4 historical statutory commemoration)
Lawphil gives August 4, 1964 as the approval date of Republic Act No. 4166.
Reviewed depth
Other in-depth guides on August 4
Source-backedFixed AnnualIn-depth guide
Constitution Day
Cook Islands government sources verify Constitution Day on 4 August, current public-holiday status, and the anniversary of self-government in free association beginning on 4 August 1965.
Source-backedFixed AnnualIn-depth guide
International Clouded Leopard Day
The Aspinall Foundation records the first International Clouded Leopard Day at Howletts on 4 August 2018 and states that it was intended as an annual international awareness day; World Anim…
Source-backedRule Based AnnualIn-depth guide
National Night Out
NATW identifies Matt Peskin as founder, documents its 1981 association formation and August 1984 campaign launch, and maintains the first-Tuesday-in-August rule with the Texas/select-area O…
Source-backedFixed AnnualIn-depth guide
Single Working Women’s Day
SWWAN creator-side history verifies Barbara Payne/SWWAN lineage and August 4 rationale while leaving the Day’s exact first recurring edition unresolved.
Explore the mix
All topics →Topics represented on August 4
4 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Constitution Day
Cook Islands government sources verify Constitution Day on 4 August, current public-holiday status, and the anniversary of self-government in free association beginning on 4 August 1965.
Source-backedFixed AnnualIn-depth guide
International Clouded Leopard Day
The Aspinall Foundation records the first International Clouded Leopard Day at Howletts on 4 August 2018 and states that it was intended as an annual international awareness day; World Anim…
Source-backedRule Based AnnualIn-depth guide
National Night Out
NATW identifies Matt Peskin as founder, documents its 1981 association formation and August 1984 campaign launch, and maintains the first-Tuesday-in-August rule with the Texas/select-area O…
Source-backedFixed AnnualIn-depth guide
Single Working Women’s Day
SWWAN creator-side history verifies Barbara Payne/SWWAN lineage and August 4 rationale while leaving the Day’s exact first recurring edition unresolved.
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 →