Evergreen date guide

What is celebrated on December 11?

For 2026, these source-backed observances resolve to Friday, December 11. Recurring rules can move in another year, so each record keeps its own date logic.

Date authority profile

What this date contains

5 unique authority records

The list is deduplicated at the public entity layer while retaining all research provenance behind each page.

0 stable or rule-calculated

0 fixed annual and 0 reusable rule-based records can be placed without inventing a new date.

0 edition-specific

Edition-specific dates appear only when the requested year matches the verified edition; variable and historical records remain gated.

3 explicit country-scope records

Country scope stays attached to the underlying record instead of being generalized into a worldwide observance.

1 reviewed in-depth guides

These entities add reviewed meaning, history, activities, facts and FAQs without rewriting the authority facts.

Curated global anchors

Major global guides on December 11

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A reviewed starting point drawn from prominent global observances with strong institutional or organizer provenance. Selection does not change each record’s official status or scope.

Source-backedFixed AnnualIn-depth guide

International Mountain Day

11 December · United Nations international observance

A/RES/57/245

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Topics represented on December 11

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Civic, Remembrance & History 2 Animals, Nature & Environment 1 Food, Drink & Hospitality 1 Workplace, Professions & Appreciation 1

5 date-resolved records

All observances on this date

Source-backedFixed Annual

Anniversary of the Statute of Westminster

11 December annually · Canada / federal commemorative and flag protocol

Canadian Heritage states that the anniversary of the Statute of Westminster is celebrated each year on December 11 and describes the associated federal flag protocol.

Source-backedFixed AnnualIn-depth guide

International Mountain Day

11 December · United Nations international observance

A/RES/57/245

Source-backedFixed Annual

National Noodle Ring Day

11 December · Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Noodle Ring Day on 11 December.

Source-backedRule Based Annual

National Salesperson Day

Second Friday in December · United States / salesperson appreciation observance

Mercy University’s career-development material states that National Salesperson Day is observed on the second Friday in December; current National Day Calendar material uses the same rule.

Source-backedFixed Annual

Proclamation of the Republic of Upper Volta / 11 December national-day context

11 December 1958 republic proclamation; modern 11 December national-day commemoration · Burkina Faso / republic-history and national-day context

The Presidency of Burkina Faso states that the Republic of Upper Volta was proclaimed on 11 December 1958. Current government sources call 11 December the national celebration and frame it…

How this date is built

This page is assembled from verified fixed dates, reusable recurrence rules, and target-year records whose edition matches 2026. Variable, historical or unresolved records are not silently forced onto this date.

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