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Evergreen date guide

What is celebrated on September 4?

See the observances and verified observance-history milestones attached to September 4. Each observance keeps its own source and date details.

About this date

What this date contains

3 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.

1 have a country-specific scope

Country-specific observances are not presented as worldwide events.

3 have in-depth guides

These pages include reviewed meaning, history, activities, facts and FAQs.

Reviewed depth

Other in-depth guides on September 4

Source-backedFixed AnnualIn-depth guide

Feast of Saint Rosalia

4 September · Catholic liturgical remembrance of Saint Rosalia, especially associated with Palermo, Sicily

Vatican News lists Saint Rosalia, Virgin of Palermo, on 4 September. The City of Palermo documents a September 4 liturgical memory in a fourteenth-century breviary fragment, supporting the…

Source-backedFixed AnnualIn-depth guide

National Wildlife Day

4 September · United States / creator-led wildlife awareness observance

Creator Colleen Paige’s current site identifies her as founder and lists National Wildlife Day on September 4. Sacramento Zoo corroborates a 2005 founding and separately notes February 22 u…

Source-backedFixed AnnualIn-depth guide

Taekwondo Day

4 September · Organizer-backed worldwide sport observance

World Taekwondo and the Taekwondo Promotion Foundation identify September 4 as Taekwondo Day, designated by the World Taekwondo General Assembly on July 25, 2006 to commemorate the IOC’s Se…

Explore the mix

Topics represented on September 4

All topics →
Faith, Tradition & Spirituality 1Animals, Nature & Environment 1Arts, Entertainment & Lifestyle 1
3 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Feast of Saint Rosalia

4 September · Catholic liturgical remembrance of Saint Rosalia, especially associated with Palermo, Sicily

Vatican News lists Saint Rosalia, Virgin of Palermo, on 4 September. The City of Palermo documents a September 4 liturgical memory in a fourteenth-century breviary fragment, supporting the…

Source-backedFixed AnnualIn-depth guide

National Wildlife Day

4 September · United States / creator-led wildlife awareness observance

Creator Colleen Paige’s current site identifies her as founder and lists National Wildlife Day on September 4. Sacramento Zoo corroborates a 2005 founding and separately notes February 22 u…

Source-backedFixed AnnualIn-depth guide

Taekwondo Day

4 September · Organizer-backed worldwide sport observance

World Taekwondo and the Taekwondo Promotion Foundation identify September 4 as Taekwondo Day, designated by the World Taekwondo General Assembly on July 25, 2006 to commemorate the IOC’s Se…

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 →