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Evergreen date guide

What is celebrated on November 23?

See the observances and verified observance-history milestones attached to November 23. 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.

2021
Institutional decision

International Geodiversity Day

The formal General Conference record states that Resolution 24 was adopted at the 15th plenary meeting on 23 November 2021.

2021
Institutional decision

World Futures Day

The official UNESCO resolutions volume states that the resolution was adopted at the 14th plenary meeting on 23 November 2021.

2021
Institutional decision

World Kiswahili Language Day

The official UNESCO resolutions volume states that Resolution 41 C/53 was adopted at the 14th plenary meeting on 23 November 2021.

2021
Institutional decision

World Novel Week

The official UNESCO resolutions volume states that Resolution 37 was adopted at the 15th plenary meeting on 23 November 2021.

2018
Later action

National Family Health History Day

NHGRI stated that every year since the November 2004 Family Health History Initiative launch, the Surgeon General had recognized Thanksgiving as National Family Health History Day…

About this date

What this date contains

1 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.

0 have a country-specific scope

Country-specific observances are not presented as worldwide events.

1 have in-depth guides

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

Reviewed depth

Other in-depth guides on November 23

Source-backedFixed AnnualIn-depth guide

Thankful for My Dog Day

23 November · Informal pet-appreciation observance created by MYOS Canine Muscle Formula; recurring date independently documented by a veterinary institution

A creator-attributed National Day Archives record identifies MYOS Canine Muscle Formula as creating the observance in October 2020; Animal Medical Center calendars independently list Novemb…

Explore the mix

Topics represented on November 23

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Animals, Nature & Environment 1
1 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Thankful for My Dog Day

23 November · Informal pet-appreciation observance created by MYOS Canine Muscle Formula; recurring date independently documented by a veterinary institution

A creator-attributed National Day Archives record identifies MYOS Canine Muscle Formula as creating the observance in October 2020; Animal Medical Center calendars independently list Novemb…

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 →