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Evergreen date guide

What is celebrated on April 12?

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

2018
Institutional decision

World Bicycle Day

The official UN action record for UN General Assembly resolution A/RES/72/272 gives the adoption/action date as 12 April 2018.

2011
First observance

International Day of Human Space Flight

UN Web TV’s 12 April 2011 report states that the United Nations celebrated the first annual International Day of Human Space Flight that day.

1993
Later action

Education and Sharing Day, U.S.A.

Federal law used the title “Education and Sharing Day, U.S.A.” for the 1993 designation after earlier Education Day, U.S.A. observances.

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.

2 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.

Curated global anchors

Major global guides on April 12

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A reviewed starting point drawn from prominent global observances with strong institutional or organizer sources. Each observance keeps its own documented status and scope.

Reviewed depth

Other in-depth guides on April 12

Source-backedFixed AnnualIn-depth guide

Cosmonautics Day

12 April · Russian Federation / national space commemoration

Current Russian government material recognizes April 12 as Cosmonautics Day; the United Nations independently verifies 12 April 1961 as Yuri Gagarin’s first human space flight, which anchor…

Source-backedFixed AnnualIn-depth guide

International Day for Street Children

12 April each year · global street-connected children rights and participation campaign

Consortium for Street Children states that it launched International Day for Street Children and continues the annual 12 April observance focused on rights, dignity and participation.

Source-backedFixed AnnualIn-depth guide

Walk on Your Wild Side Day

12 April · United States / creator-defined informal Wellcat observance on April 12.

Wellcat’s creator calendar lists Walk on Your Wild Side Day on April 12 and identifies Wellcat Holidays as creations of Thomas and Ruth Roy; independent observance coverage also credits Tho…

Source-backedFixed AnnualIn-depth guide

World Hamster Day

12 April · Informal animal-awareness calendar usage; canonical source wording is “World Hamster Day”

The Animal Medical Center repeatedly lists World Hamster Day on April 12 in annual pet-awareness calendars.

Explore the mix

Topics represented on April 12

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Civic, Remembrance & History 1Community, Causes & Advocacy 1Arts, Entertainment & Lifestyle 1Celebrations & Social 1Animals, Nature & Environment 1
5 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Cosmonautics Day

12 April · Russian Federation / national space commemoration

Current Russian government material recognizes April 12 as Cosmonautics Day; the United Nations independently verifies 12 April 1961 as Yuri Gagarin’s first human space flight, which anchor…

Source-backedFixed AnnualIn-depth guide

International Day for Street Children

12 April each year · global street-connected children rights and participation campaign

Consortium for Street Children states that it launched International Day for Street Children and continues the annual 12 April observance focused on rights, dignity and participation.

Source-backedFixed AnnualIn-depth guide

Walk on Your Wild Side Day

12 April · United States / creator-defined informal Wellcat observance on April 12.

Wellcat’s creator calendar lists Walk on Your Wild Side Day on April 12 and identifies Wellcat Holidays as creations of Thomas and Ruth Roy; independent observance coverage also credits Tho…

Source-backedFixed AnnualIn-depth guide

World Hamster Day

12 April · Informal animal-awareness calendar usage; canonical source wording is “World Hamster Day”

The Animal Medical Center repeatedly lists World Hamster Day on April 12 in annual pet-awareness calendars.

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 →