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Evergreen date guide

What is celebrated on October 23?

For 2026, these source-backed observances resolve to Friday, October 23. Recurring rules can move in another year, so each record keeps its own date logic.

Date authority profile

What this date contains

7 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.

1 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.

Reviewed depth

Other in-depth guides on October 23

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Topics represented on October 23

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Civic, Remembrance & History 2Food, Drink & Hospitality 2Animals, Nature & Environment 2Arts, Entertainment & Lifestyle 1
7 date-resolved records

All observances on this date

Source-backedFixed Annual

23 October national holiday

23 October annually · Hungary / national civic observance

Hungary’s government memorial-day authority states that Act VIII of 1991 declared 23 October an official national holiday and that the Fundamental Law confirmed its status; the date also ma…

Source-backedRule Based Annual

Champagne Day

Fourth Friday in October; 23 October 2026 · Champagne industry / Comité Champagne event

The official Champagne site lists Champagne Day 2026 for October 23 and states that it takes place on the fourth Friday in October.

Source-backedFixed Annual

Mole Day

23 October, traditionally 6:02 a.m. to 6:02 p.m. · National Mole Day Foundation / chemistry education

The National Mole Day Foundation identifies 23 October and the 6:02 timing as a chemistry-education observance tied to Avogadro’s number

Source-backedFixed Annual

National Boston Cream Pie Day

23 October · 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 Boston Cream Pie Day on 23 October.

Source-backedFixed Annual

Swallows Depart from San Juan Capistrano Day

23 October · San Juan Capistrano, California / swallow-migration cultural tradition

Mission San Juan Capistrano materials associate 23 October, the Day of San Juan, with the traditional departure of the swallows; Journey North independently documents the late-October migra…

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.

Read the methodology →