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Evergreen date guide

What is celebrated on September 3?

See the observances and verified observance-history milestones attached to September 3. 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.

2025
Later action

Bonifacio Day

Declared Bonifacio Day a regular holiday on 30 November for the 2026 holiday calendar.

2000
First observance

Merchant Navy Day

GOV.UK calls 2011 the twelfth Merchant Navy Day and separately says the observance was introduced in 2000, supporting September 3, 2000 as the first annual observance.

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.

2 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 September 3

Source-backedFixed AnnualIn-depth guide

Merchant Navy Day

3 September · United Kingdom

GOV.UK marks Merchant Navy Day on 3 September and describes the contribution of merchant seafarers

Explore the mix

Topics represented on September 3

All topics →
Civic, Remembrance & History 1Workplace, Professions & Appreciation 1
2 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Merchant Navy Day

3 September · United Kingdom

GOV.UK marks Merchant Navy Day on 3 September and describes the contribution of merchant seafarers

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 →