Evergreen date guide

What is celebrated on December 31?

For 2026, these source-backed observances resolve to Thursday, December 31. 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.

4 explicit country-scope records

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

0 reviewed in-depth guides

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

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Topics represented on December 31

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Civic, Remembrance & History 2 Community, Causes & Advocacy 2 Food, Drink & Hospitality 1

5 date-resolved records

All observances on this date

Source-backedFixed Annual

National Champagne Day

31 December · United States / informal Champagne observance

National Day Calendar and National Today independently place National Champagne Day on December 31 each year.

Source-backedFixed Annual

National Heroes Day

31 December annually · Timor-Leste / fixed public holiday

Timor-Leste’s official 2026 holiday list, applying Law No. 10/2005, lists 31 December as National Heroes Day among fixed public holidays.

Source-backedFixed Annual

Restauration de la République

31 December annually; 31 December 2026 listed as an official holiday · Canton of Geneva, Switzerland / cantonal official holiday

The Canton of Geneva’s official holiday calendar lists Restauration de la République on 31 December, including 31 December 2026 and subsequent calendars.

Source-backedFixed Annual

World Azerbaijanis Solidarity Day

31 December annually · Azerbaijan / national observance

Azerbaijan’s official presidential holiday information identifies 31 December as World Azerbaijanis Solidarity Day; current presidential messages use the same name.

Source-backedFixed Annual

World Peace Meditation Day

31 December · International / informal peace-and-meditation observance

Checkiday and EventGuide independently list World Peace Meditation Day on December 31.

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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