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Evergreen date guide

What is celebrated on September 23?

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

Date authority profile

What this date contains

10 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.

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 September 23

See the collection →

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.

Explore the mix

Topics represented on September 23

All topics →
Food, Drink & Hospitality 4Community, Causes & Advocacy 2Animals, Nature & Environment 2Workplace, Professions & Appreciation 1Health, Wellness & Awareness 1
10 date-resolved records

All observances on this date

Source-backedFixed Annual

Celebrate Bisexuality Day

23 September annually in the cited GLAAD community calendar · Bisexual+ community visibility and awareness observance

GLAAD’s LGBTQ community calendar states that Bisexual+ Awareness Week culminates in Celebrate Bisexuality Day on 23 September.

Source-backedFixed Annual

National Apple Cider Vinegar Day

23 September · United States / Bragg-created brand observance

Bragg states that National Apple Cider Vinegar Day is celebrated on September 23 and identifies the observance as a Bragg-created campaign.

Source-backedFixed Annual

National Field Marketer’s Day

23 September · United States / Splash-created field-marketing recognition observance

Splash created the inaugural National Field Marketer’s Day for September 23, 2021 and states in its launch announcement that it planned the day to become an annual celebration; the registry…

Source-backedFixed Annual

National Great American Pot Pie Day

23 September · United States / Marie Callender’s-created food observance

National Day Calendar records September 23 as National Great American Pot Pie Day and attributes creation of the observance to Marie Callender’s in 2002.

Source-backedFixed Annual

National Snack Stick Day

23 September · United States / Klement’s-created snack-stick celebration

Klement’s company history states that it founded National Snack Stick Day in 2016 and ties the celebration to September 23.

Source-backedFixed Annual

National White Chocolate Day

23 September · 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 White Chocolate Day on 23 September.

Source-backedFixed Annual

RLS Awareness Day

23 September annually · Restless Legs Syndrome Foundation / awareness campaign

The Restless Legs Syndrome Foundation’s own materials identify 23 September as RLS Awareness Day and describe participation in the annual awareness campaign.

Source-backedEdition Specific

September equinox

23 September 2026 at 00:05 UT · Global astronomical event / USNO 2026 season table

The U.S. Naval Observatory gives the September 2026 equinox at 00:05 UT on 23 September.

Source-backedEdition Specific

September equinox (Northern Hemisphere fall equinox)

23 September 2026 at 00:05 UT · Astronomical event / Northern Hemisphere seasonal naming

The U.S. Naval Observatory gives the September equinox at 00:05 UT on 23 September 2026; seasonal naming depends on hemisphere.

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 →