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Evergreen date guide

What is celebrated on December 22?

See the observances and verified observance-history milestones attached to December 22. 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.

2025
Later action

Libya Independence Day

Applied Wednesday, December 24, 2025 as an official holiday in public institutions for the 74th independence anniversary, with specified service exceptions.

2015
First observance

National Cookie Exchange Day

Checkiday lists the observance annually on December 22 since 2015, and its cited creator-page URL is dated December 22, 2015; this supports the first recurring edition while prese…

2015
Institutional decision

World Tsunami Awareness Day

The official UN action record for UN General Assembly resolution A/RES/70/203 gives the adoption/action date as 22 December 2015.

2008
Institutional decision

World Sickle Cell Day

The United Nations Digital Library records adoption on 22 December 2008.

About this date

What this date contains

2 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.

2 have a country-specific scope

Country-specific observances are not presented as worldwide events.

2 have in-depth guides

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

Reviewed depth

Other in-depth guides on December 22

Source-backedFixed AnnualIn-depth guide

National Cookie Exchange Day

22 December · United States / informal seasonal baking and social observance

Multiple observance references consistently place National Cookie Exchange Day on December 22.

Source-backedFixed AnnualIn-depth guide

National Mathematics Day (India)

22 December · India / Government of India observance marking the birth anniversary of Srinivasa Ramanujan

The Government of India announced 22 December, Ramanujan’s birthday, as National Mathematics Day in 2011; a later Press Information Bureau release states that National Mathematics Day is ce…

Explore the mix

Topics represented on December 22

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Food, Drink & Hospitality 1Arts, Entertainment & Lifestyle 1
2 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

National Cookie Exchange Day

22 December · United States / informal seasonal baking and social observance

Multiple observance references consistently place National Cookie Exchange Day on December 22.

Source-backedFixed AnnualIn-depth guide

National Mathematics Day (India)

22 December · India / Government of India observance marking the birth anniversary of Srinivasa Ramanujan

The Government of India announced 22 December, Ramanujan’s birthday, as National Mathematics Day in 2011; a later Press Information Bureau release states that National Mathematics Day is ce…

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 →