World Maritime Day
IMO / UN observance
IMO / UN observance
This observance follows a reusable calendar rule rather than one fixed Gregorian date. The actual date can move from year to year. Rule: Last Thursday of September Public-holiday or government status is never inferred from the observance name alone.
Overview
World Maritime Day is observed on the last Thursday of September as the major annual United Nations/International Maritime Organization observance focused on shipping, maritime safety, security and environmental performance.
The numerical date changes from year to year because the observance follows a weekday rule. IMO also chooses a theme, and theme-specific material should be treated as edition-specific rather than evergreen.
Why it matters
International shipping depends on common technical and legal standards because ships routinely operate across national jurisdictions. World Maritime Day highlights aspects of IMO’s work on safe, secure, efficient and environmentally responsible shipping.
The observance is not the same as Day of the Seafarer, which specifically recognizes seafarers and their contribution to shipping and the world economy.
History
IMO states that World Maritime Day was conceived in 1978 to help Member Governments and the maritime community promote the Organization’s work, achievements and objectives.
World Maritime Day was first held on 17 March 1978, marking twenty years since the IMCO Convention entered into force in 1958.
The observance is now held on the last Thursday of September. IMO’s establishing convention was adopted in 1948, entered into force in 1958 and the Organization first met in 1959; those institutional milestones should not be confused with the start of World Maritime Day itself.
How the observance developed
This timeline is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
International Maritime Organization (IMO)
IMO describes World Maritime Day as an observance conceived in 1978 for Member Governments and the maritime community.
International Maritime Organization (IMO)
IMCO/C XXXVIII/21
First documented observance
ICAO’s official institutional history of IMO states that World Maritime Day was first held on 17 March 1978 to mark the twentieth anniversary of the IMCO Convention entering into force.
International Maritime Organization (IMO)
IMO maintains the World Maritime Day programme, annual theme and archive.
What the evidence establishes
Verified institutional roles and milestones are shown first. Fields that the reviewed sources do not establish remain fail-closed and are available below without competing with the confirmed record.
4 fields not established in reviewed sources
Ways to observe
Use IMO sources to explore a current safety, environmental or regulatory theme in international shipping.
Compare shipping’s international rule-making needs with a land-based transport sector.
Recognize maritime workers while distinguishing World Maritime Day from the seafarer-specific 25 June observance.
Refresh the annual IMO theme and event details rather than storing them as permanent facts.
Useful facts
World Maritime Day is observed on the last Thursday of September.
IMO says the observance was conceived in 1978.
The first World Maritime Day was held on 17 March 1978.
IMO selects a World Maritime Day theme, which changes by edition.
The IMO Convention entered into force in 1958; that is institutional history, not the start date of the observance.
Topic and context
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.
Evidence & sources
Repeated links from the authority record, institutional provenance and editorial guide research are consolidated here. Badges show how each source is used; a contextual source is never treated as proof of establishment on its own.
International Civil Aviation Organization — ICAO and the International Maritime Organization (opens in a new tab)
International Maritime Organization — Convention and institutional history (opens in a new tab)
International Maritime Organization — World Maritime Day archives (opens in a new tab)
International Maritime Organization — World Maritime Day origin statement (opens in a new tab)
United Nations — World Maritime Day (opens in a new tab)
Source Linked Authoritative Page
Understand it, compare it, then explore further
Start with the most common factual questions, then use reviewed distinctions and related authority records to understand where this observance fits.
Frequently asked questions
When is World Maritime Day?
Last Thursday of September The stored recurrence guidance is: Last Thursday of September.
Does World Maritime 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 World Maritime Day an official public holiday?
The authority record verifies it within this scope: United Nations / IMO international observance. 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 World Maritime Day?
The reviewed provenance layer identifies International Maritime Organization (IMO) as the proclaiming or establishing body. Current facilitation or coordination is recorded as International Maritime Organization (IMO).
Is World Maritime Day international or country-specific?
The record has international or global institutional scope: United Nations / IMO international observance. That does not mean every country treats the date as a public holiday or observes it in the same way.
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 2026-09-05.
Does World Maritime Day fall on the same numerical date every year?
No. It is observed on the last Thursday of September, so its numerical date changes.
When did World Maritime Day begin?
IMO states that World Maritime Day was conceived in 1978 to promote awareness of the Organization’s work and maritime priorities.
Is World Maritime Day the same as Day of the Seafarer?
No. World Maritime Day focuses broadly on shipping and IMO priorities, while Day of the Seafarer specifically recognizes seafarers.
How this differs from closely related observances
These distinctions are separately reviewed and source-backed. They clarify scope; they do not change either authority record.
Is World Maritime Day the same as World Oceans Day?
World Maritime Day focuses on international shipping and IMO priorities such as maritime safety, security and environmental performance. World Oceans Day has a broader ocean-health, ecosystems and human-ocean relationship scope.
Open World Oceans Day →Distinction sources
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