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Evergreen date guide

What is celebrated on December 12?

See the observances and verified observance-history milestones attached to December 12. 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.

2024
Institutional decision

World Lake Day

The UN Digital Library and General Assembly record the resolution as adopted on 12 December 2024.

2019
Institutional decision

World Chess Day

The official UN action record for UN General Assembly resolution A/RES/74/22 gives the adoption/action date as 12 December 2019.

2018
First observance

International Universal Health Coverage Day

WHO documented International UHC Day events on 12 December 2018 after the 2017 designation; the earlier 2014 UHC Day is stored separately as a precursor.

About this date

What this date contains

5 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.

5 have in-depth guides

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

Reviewed depth

Other in-depth guides on December 12

Source-backedFixed AnnualIn-depth guide

Feast of Our Lady of Guadalupe

12 December · Catholic Marian feast with especially strong significance in Mexico and the Americas

Vatican sources identify 12 December as the feast of Our Lady of Guadalupe.

Source-backedFixed AnnualIn-depth guide

Jamhuri Day

12 December · Kenyan national observance and public holiday

Office of the President of the Republic of Kenya

Source-backedFixed AnnualIn-depth guide

Pa-Togan Nengminza Sangma

12 December · Meghalaya commemorative holiday

Government of Meghalaya

Explore the mix

Topics represented on December 12

All topics →
Civic, Remembrance & History 3Celebrations & Social 1Health, Wellness & Awareness 1
5 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Feast of Our Lady of Guadalupe

12 December · Catholic Marian feast with especially strong significance in Mexico and the Americas

Vatican sources identify 12 December as the feast of Our Lady of Guadalupe.

Source-backedFixed AnnualIn-depth guide

Jamhuri Day

12 December · Kenyan national observance and public holiday

Office of the President of the Republic of Kenya

Source-backedFixed AnnualIn-depth guide

Pa-Togan Nengminza Sangma

12 December · Meghalaya commemorative holiday

Government of Meghalaya

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 →