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Evergreen date guide

What is celebrated on April 24?

For 2026, these source-backed observances resolve to Friday, April 24. Recurring rules can move in another year, so each record keeps its own date logic.

Date authority profile

What this date contains

9 unique authority records

The list is deduplicated at the public entity layer while retaining all research provenance behind each page.

0 stable or rule-calculated

0 fixed annual and 0 reusable rule-based records can be placed without inventing a new date.

0 edition-specific

Edition-specific dates appear only when the requested year matches the verified edition; variable and historical records remain gated.

4 explicit country-scope records

Country scope stays attached to the underlying record instead of being generalized into a worldwide observance.

1 reviewed in-depth guides

These entities add reviewed meaning, history, activities, facts and FAQs without rewriting the authority facts.

Curated global anchors

Major global guides on April 24

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A reviewed starting point drawn from prominent global observances with strong institutional or organizer provenance. Selection does not change each record’s official status or scope.

Explore the mix

Topics represented on April 24

All topics →
Animals, Nature & Environment 3Civic, Remembrance & History 3Health, Wellness & Awareness 3
9 date-resolved records

All observances on this date

Source-backedRule Based Annual

Arbor Day

Last Friday in April; 24 April 2026 · United States; tree-planting and stewardship observance promoted by the Arbor Day Foundation

The Arbor Day Foundation describes National Arbor Day as the last Friday in April; in 2026 that is 24 April.

Source-backedEdition Specific

Day of Remembrance for the Victims of the Armenian Genocide

24 April; 24 April 2026 edition verified · Armenia / national remembrance

The President of Armenia’s 24 April 2026 release records the country’s senior leadership visiting Tsitsernakaberd on the Day of Remembrance for the Victims of the Genocide and paying tribut…

Source-backedRule Based Annual

National Hairball Awareness Day

Last Friday of April (24 April in 2026) · United States / cat-health awareness observance

The Animal Medical Center’s 2026 veterinary-awareness calendar and National Day Calendar both place Hairball Awareness Day on the last Friday in April.

Source-backedFixed Annual

National Pet Care for All Day

24 April · United States / East Bay SPCA-founded accessible-pet-care awareness day

East Bay SPCA states that it established National Pet Care for All Day on April 24, 2024, its 150th anniversary, to promote accessible pet care.

Source-backedRule Based Annual

Undiagnosed Children’s Day

Last Friday in April; 24 April 2026 · United Kingdom / SWAN UK and Genetic Alliance UK awareness campaign

Genetic Alliance UK states that Undiagnosed Children’s Day is an annual awareness day on the last Friday in April and lists April 24 for 2026.

Source-backedFixed Annual

World Day for Animals in Laboratories

24 April annually · International / animal-research advocacy observance

The campaign’s official history identifies 24 April and traces the observance to 1979; NAVS also marks the date in current advocacy material.

Source-backedRule Based Annual

World Women’s Wellness Day

Last Friday in April · International / informal women’s wellness observance

National Today and Days Of The Year independently place World Women’s Wellness Day on the last Friday in April.

How this date is built

This page is assembled from verified fixed dates, reusable recurrence rules, and target-year records whose edition matches 2026. Variable, historical or unresolved records are not silently forced onto this date.

Read the methodology →