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Evergreen date guide

What is celebrated on May 23?

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

2022
Institutional decision

World Seagrass Day

The UN Digital Library records adoption without a vote at the 74th plenary meeting on 23 May 2022.

2008
Institutional decision

Independence Day

The Official Gazette text dates Law No. 03/L-064 to 23 May 2008; it entered into force on publication on 15 June 2008.

2007
Institutional decision

World Malaria Day

The WHA60.18 resolution records adoption at the eleventh plenary meeting on 23 May 2007.

2005
Institutional decision

World Blood Donor Day

WHO official records show WHA58.13 was adopted at the eighth plenary meeting on 23 May 2005.

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.

0 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 May 23

Source-backedFixed AnnualIn-depth guide

World Turtle Day®

23 May annually; 23 May 2026 verified · International / American Tortoise Rescue campaign

The official World Turtle Day site states that American Tortoise Rescue founded the observance in 2000 and that World Turtle Day is held annually on May 23; its 2026 release marks the 26th…

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Topics represented on May 23

All topics →
Health, Wellness & Awareness 1Animals, Nature & Environment 1
2 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

World Turtle Day®

23 May annually; 23 May 2026 verified · International / American Tortoise Rescue campaign

The official World Turtle Day site states that American Tortoise Rescue founded the observance in 2000 and that World Turtle Day is held annually on May 23; its 2026 release marks the 26th…

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 →