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Evergreen date guide

What is celebrated on December 5?

See the observances and verified observance-history milestones attached to December 5. 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.

2014
First observance

World Soil Day

The UN General Assembly designated 5 December 2014 as the first official World Soil Day.

2008
Institutional decision

World Oceans Day

Exact action/adoption date of the establishing instrument in the reviewed institutional/legal source.

2003
Later action

Sámi National Day

Added February 6 to Norway’s official flag days, with official flag-day status applying from 2004.

1980
First observance

National Father’s Day

Thai government public-information material states that National Father’s Day was first held on 5 December 1980.

About this date

What this date contains

7 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.

4 have a country-specific scope

Country-specific observances are not presented as worldwide events.

7 have in-depth guides

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

Curated global anchors

Major global guides on December 5

See the collection →

A reviewed starting point drawn from prominent global observances with strong institutional or organizer sources. Each observance keeps its own documented status and scope.

Reviewed depth

Other in-depth guides on December 5

Source-backedFixed AnnualIn-depth guide

Bathtub Party Day

5 December · United States / creator-defined informal Wellcat observance

The first-party Wellcat Holidays calendar lists Bathtub Party Day on December 5 and identifies the collection as created by Thomas and Ruth Roy; unsupported origin stories and unsafe or pri…

Source-backedRule Based AnnualIn-depth guide

Global Fat Bike Day

First Saturday of December · International / grassroots fat-bike cycling community

Cycling-community sources describe Global Fat Bike Day as a grassroots celebration held on the first Saturday of December; Flatlands Cycling lists 5 December for 2026.

Source-backedFixed AnnualIn-depth guide

National Father’s Day

5 December every year; 5 December 2026 · Thailand / national observance

Thailand’s Government Public Relations Department states that 5 December, the birthday of the late King Bhumibol Adulyadej The Great, is also observed as Thailand’s National Day and Nationa…

Source-backedRule Based AnnualIn-depth guide

National Patio Day

First Saturday of December · Australia / Stratco and Cancer Council fundraising and sun-safety campaign

Stratco and Cancer Council materials establish the 2019 Australian launch and first-Saturday-of-December recurrence; current exclusive stewardship remains unresolved.

Source-backedRule Based AnnualIn-depth guide

SKYWARN Recognition Day

First Saturday in December; confirm target-year edition status · United States / National Weather Service and amateur-radio community

National Weather Service states that SKYWARN Recognition Day was developed in 1999 by the NWS and ARRL, and its archive identifies the first event on 27 November 1999. The normal recurrence…

Source-backedFixed AnnualIn-depth guide

World Soil Day

5 December · FAO / United Nations / international observance

A/RES/68/232

Explore the mix

Topics represented on December 5

All topics →
Celebrations & Social 2Workplace, Professions & Appreciation 2Arts, Entertainment & Lifestyle 1Relationships & Family 1Animals, Nature & Environment 1
7 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Bathtub Party Day

5 December · United States / creator-defined informal Wellcat observance

The first-party Wellcat Holidays calendar lists Bathtub Party Day on December 5 and identifies the collection as created by Thomas and Ruth Roy; unsupported origin stories and unsafe or pri…

Source-backedRule Based AnnualIn-depth guide

Global Fat Bike Day

First Saturday of December · International / grassroots fat-bike cycling community

Cycling-community sources describe Global Fat Bike Day as a grassroots celebration held on the first Saturday of December; Flatlands Cycling lists 5 December for 2026.

Source-backedFixed AnnualIn-depth guide

National Father’s Day

5 December every year; 5 December 2026 · Thailand / national observance

Thailand’s Government Public Relations Department states that 5 December, the birthday of the late King Bhumibol Adulyadej The Great, is also observed as Thailand’s National Day and Nationa…

Source-backedRule Based AnnualIn-depth guide

National Patio Day

First Saturday of December · Australia / Stratco and Cancer Council fundraising and sun-safety campaign

Stratco and Cancer Council materials establish the 2019 Australian launch and first-Saturday-of-December recurrence; current exclusive stewardship remains unresolved.

Source-backedRule Based AnnualIn-depth guide

SKYWARN Recognition Day

First Saturday in December; confirm target-year edition status · United States / National Weather Service and amateur-radio community

National Weather Service states that SKYWARN Recognition Day was developed in 1999 by the NWS and ARRL, and its archive identifies the first event on 27 November 1999. The normal recurrence…

Source-backedFixed AnnualIn-depth guide

World Soil Day

5 December · FAO / United Nations / international observance

A/RES/68/232

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 →