Source-backedRule Based Annual

Marine Day (Umi no Hi)

Cabinet Office, Government of Japan

Date / ruleThird Monday in July; 20 July 2026
ScopeJapanese national holiday
VerificationGovernment Verified
PortabilityRule Based Annual
Evidence statusSource-backed
Last authority check2026-09-06
Target-year policyCalculate Rule
Next date this engine can safely resolveMonday, July 19, 2027See everything on July 19 →
Authority summary

What is Marine Day (Umi no Hi)?

Cabinet Office, Government of Japan

Date and recurrence

Third Monday in July; 20 July 2026

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

Scope and status

The verified scope stored for this record is Japanese national holiday. The site preserves that boundary and does not infer broader government, global or public-holiday status from the observance name alone.

Also known as

Marine Day in Japan

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. Cabinet Office Japan — National holidaysNational Government Holiday Law Guidance
  2. Cabinet Office Japan — Marine Day backgroundNational Government Dedicated Page
Reader questions

Frequently asked questions

When is Marine Day (Umi no Hi)?

Third Monday in July; 20 July 2026 The stored recurrence guidance is: Third Monday in July.

Does Marine Day (Umi no Hi) fall on the same date every year?

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

Is Marine Day (Umi no Hi) an official public holiday?

The authority record verifies it within this scope: Japanese national holiday. 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 Marine Day (Umi no Hi)?

The stored designation basis is: Cabinet Office, Government of Japan. Supporting provenance includes Cabinet Office Japan — National holidays. The site does not infer a separate creator or founder unless reviewed evidence establishes one.

Is Marine Day (Umi no Hi) international or country-specific?

No single country is assigned to this record in the authority dataset. The source-defined scope is: Japanese national holiday. 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 2026-09-06.

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