Evergreen date guide

What is celebrated on August 23?

See the observances and verified observance-history milestones attached to August 23. 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.

2024

First observance

National Space Day

Press Information Bureau material explicitly describes the August 23, 2024 event as India’s first-ever National Space Day.

2016

First observance

National Cuban Sandwich Day

Spata’s origin story was published on August 23, 2016 and later institutional reporting describes the experiment taking off when August 23 arrived.

2013

Institutional decision

International Day of Sport for Development and Peace

UN Digital Library records 23 August 2013 as the action/adoption date of General Assembly resolution 67/296.

1998

First observance

International Day for the Remembrance of the Slave Trade and Its Abolition

UNESCO explicitly states that the International Day was first celebrated in a number of countries, in particular in Haiti on 23 August 1998 and on Gorée Island in Senegal on 23 Au…

1994

Institutional decision

National Pearl Harbor Remembrance Day

The U.S. Code historical notes give August 23, 1994 for Public Law 103-308.

About this date

What this date contains

5 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.

5 have in-depth guides

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

Curated global anchors

Major global guides on August 23

See the collection →

A reviewed starting point drawn from prominent global observances with strong institutional or organizer sources. Each observance keeps its own documented status and scope.

Source-backedFixed AnnualIn-depth guide

International Day for the Remembrance of the Slave Trade and Its Abolition

23 August · UNESCO / international observance

UNESCO 29 C/Resolution 40

Reviewed depth

Other in-depth guides on August 23

Source-backedFixed AnnualIn-depth guide

European Day of Remembrance for Victims of Stalinism and Nazism

23 August · European Union / European remembrance observance

The European Parliament adopted Written Declaration P6_DCL(2008)0044 / P6_TA(2008)0439 on 23 September 2008 proposing 23 August as the European Day of Remembrance for Victims of Stalinism a…

Source-backedFixed AnnualIn-depth guide

Health Unit Coordinator Day / Health Unit Coordinator Recognition Week

23 August; Recognition Week 23–29 August · National Association of Health Unit Coordinators / professional recognition

NAHUC states that 23 August has been recognized as Health Unit Coordinator Day and that beginning in 2017 the association expanded recognition to the full week of 23–29 August.

Source-backedFixed AnnualIn-depth guide

National Cuban Sandwich Day

23 August · United States / informal food observance created in Tampa as a 2016 journalism experiment

Tampa Bay Times reporter Christopher Spata documented creating National Cuban Sandwich Day for August 23, 2016 as a journalism experiment; later University of South Florida institutional ma…

Source-backedFixed AnnualIn-depth guide

National Space Day

23 August each year · India

Government of India Department of Space Notification F. No. DS_5-18013/8/2023-V, dated 13 October 2023, declares August 23 every year as National Space Day to commemorate the Chandrayaan-3…

Explore the mix

Topics represented on August 23

All topics →

Civic, Remembrance & History 3 Workplace, Professions & Appreciation 1 Food, Drink & Hospitality 1

5 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

European Day of Remembrance for Victims of Stalinism and Nazism

23 August · European Union / European remembrance observance

The European Parliament adopted Written Declaration P6_DCL(2008)0044 / P6_TA(2008)0439 on 23 September 2008 proposing 23 August as the European Day of Remembrance for Victims of Stalinism a…

Source-backedFixed AnnualIn-depth guide

Health Unit Coordinator Day / Health Unit Coordinator Recognition Week

23 August; Recognition Week 23–29 August · National Association of Health Unit Coordinators / professional recognition

NAHUC states that 23 August has been recognized as Health Unit Coordinator Day and that beginning in 2017 the association expanded recognition to the full week of 23–29 August.

Source-backedFixed AnnualIn-depth guide

International Day for the Remembrance of the Slave Trade and Its Abolition

23 August · UNESCO / international observance

UNESCO 29 C/Resolution 40

Source-backedFixed AnnualIn-depth guide

National Cuban Sandwich Day

23 August · United States / informal food observance created in Tampa as a 2016 journalism experiment

Tampa Bay Times reporter Christopher Spata documented creating National Cuban Sandwich Day for August 23, 2016 as a journalism experiment; later University of South Florida institutional ma…

Source-backedFixed AnnualIn-depth guide

National Space Day

23 August each year · India

Government of India Department of Space Notification F. No. DS_5-18013/8/2023-V, dated 13 October 2023, declares August 23 every year as National Space Day to commemorate the Chandrayaan-3…

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 →