Evergreen date guide

What is celebrated on August 25?

See the observances and verified observance-history milestones attached to August 25. Each observance keeps its own source and date details.

Verified history

On this date in observance history

Today in history →

Selected observance milestones connected to this date, based on reviewed sources.

2023

Institutional decision

International Day of Clean Energy

The official UN action record for UN General Assembly resolution A/RES/77/327 gives the adoption/action date as 25 August 2023.

2023

Institutional decision

World Basketball Day

The UN Digital Library records A/RES/77/324 as adopted without a vote on 25 August 2023.

About this date

What this date contains

2 observances

Each observance is shown once in this view, with its own source and scope details available on the guide page.

0 repeat predictably

0 use a fixed annual date and 0 follow a reusable calendar rule.

0 are edition-specific

These dates are shown only for the year or edition that has been confirmed.

2 have a country-specific scope

Country-specific observances are not presented as worldwide events.

2 have in-depth guides

These pages include reviewed meaning, history, activities, facts and FAQs.

Reviewed depth

Other in-depth guides on August 25

Source-backedFixed AnnualIn-depth guide

Independence Day

25 August · Uruguay

Uruguay Presidency, culture ministry and IMPO legal sources verify the August 25 Declaratoria de la Independencia commemoration, 1825 historical anchor and current paid-holiday treatment.

Source-backedFixed AnnualIn-depth guide

National Park Service Founders Day

25 August annually · 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.

Explore the mix

Topics represented on August 25

All topics →

Civic, Remembrance & History 2

2 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Independence Day

25 August · Uruguay

Uruguay Presidency, culture ministry and IMPO legal sources verify the August 25 Declaratoria de la Independencia commemoration, 1825 historical anchor and current paid-holiday treatment.

Source-backedFixed AnnualIn-depth guide

National Park Service Founders Day

25 August annually · 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.

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 →