Source-backedRule Based Annual

Arbor Day

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

Date / ruleLast Friday in April; 24 April 2026
ScopeUnited States; tree-planting and stewardship observance promoted by the Arbor Day Foundation
VerificationFoundation Organizer Verified
PortabilityRule Based Annual
Evidence statusSource-backed
Last authority check2026-09-07
Target-year policyCalculate Rule
Next date this engine can safely resolveFriday, April 30, 2027See everything on April 30 →
Authority summary

What is Arbor Day?

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

Date and recurrence

Last Friday in April; 24 April 2026

This observance follows a reusable calendar rule rather than one fixed Gregorian date. The actual date can move from year to year. Rule: Last Friday in April

Scope and status

The verified scope stored for this record is United States; tree-planting and stewardship observance promoted by the Arbor Day Foundation. The site preserves that boundary and does not infer broader government, global or public-holiday status from the observance name alone.

Also known as

National Arbor Day

Classification

Topic and context

Animals, Nature & Environment →
Accuracy controls

What this page does not assume

  • Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
  • Do not treat the title alone as proof of government recognition or public-holiday status.
  • Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Provenance

Sources

Source policy →
  1. Arbor Day Foundation — National Arbor Day 2026Foundation Organizer
Reader questions

Frequently asked questions

When is Arbor Day?

Last Friday in April; 24 April 2026 The stored recurrence guidance is: Last Friday in April.

Does Arbor Day fall on the same date every year?

It follows a recurring calendar rule, so the Gregorian date can change from year to year.

Is Arbor Day an official public holiday?

The authority record verifies it within this scope: United States; tree-planting and stewardship observance promoted by the Arbor Day Foundation. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when the supporting authority record explicitly does so.

Who established or recognizes Arbor Day?

The stored designation basis is: The Arbor Day Foundation describes National Arbor Day as the last Friday in April; in 2026 that is 24 April.. Supporting provenance includes Arbor Day Foundation — National Arbor Day 2026. The site does not infer a separate creator or founder unless reviewed evidence establishes one.

Is Arbor Day international or country-specific?

No single country is assigned to this record in the authority dataset. The source-defined scope is: United States; tree-planting and stewardship observance promoted by the Arbor Day Foundation. Use that scope rather than assuming worldwide or country-specific status.

How is this page verified?

The factual layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record was checked on 2026-09-07.

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