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Evergreen date guide

What is celebrated on April 1?

See the observances and verified observance-history milestones attached to April 1. 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
First observance

National Greeting Card Day

The creator record dates creation to March 2021 for annual April 1 recurrence, and contemporary “New Holidays 2021” material lists National Greeting Card Day on April 1.

2016
Later action

Implantação da República

Restored national holidays, including 5 October, to the Labour Code’s mandatory-holiday framework.

1989
Precursor

Play-the-Recorder Day

The success of the 1989 one-day worldwide event caused the American Recorder Society to create an annual Play-the-Recorder Day beginning in 1992.

1926
Institutional decision

August 30 Victory Day

The official government chronology dates Law No. 795 to April 1, 1926.

About this date

What this date contains

10 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.

5 have a country-specific scope

Country-specific observances are not presented as worldwide events.

10 have in-depth guides

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

Reviewed depth

Other in-depth guides on April 1

Source-backedEdition SpecificIn-depth guide

Assyrian New Year (Akito)

1 April in the Kurdistan Region’s 2026 calendar · Assyrian/Babylonian New Year (Akitu) cultural celebration; April 1 has current official recognition in the Kurdistan Region, with broader community practice not reduced to one jurisdiction.

Kurdistan Region sources list Assyrian New Year (Akito) on April 1 in the 2026 official calendar, declare April 1, 2026 a regional government holiday, and preserve consecutive presidential…

Source-backedRule Based AnnualIn-depth guide

Childhelp National Day of Hope

First Wednesday of April · United States child-abuse prevention and survivor-support awareness observance

Childhelp; congressional recognition cited by the organizer

Source-backedFixed AnnualIn-depth guide

Cyprus National Day

1 April · Cyprus / public-holiday calendar

Official Cyprus diplomatic material lists Cyprus National Day on 1 April among the country’s public holidays.

Source-backedFixed AnnualIn-depth guide

International Edible Book Festival / Edible Book Day

1 April · International participatory book-art/food event

The Books2Eat creator site identifies Judith A. Hoffberg and Béatrice Coron as the creators and explains the April 1 date for the International Edible Book Festival.

Source-backedFixed AnnualIn-depth guide

National Greeting Card Day

1 April · United States / Lovepop-created greeting-card observance

National Day Archives records Lovepop Cards as creator in March 2021 for an annual April 1 observance; Lovepop first-party material ties April 1 to its April 1, 2014 launch anniversary and…

Explore the mix

Topics represented on April 1

All topics →
Civic, Remembrance & History 3Arts, Entertainment & Lifestyle 3Workplace, Professions & Appreciation 2Celebrations & Social 1Community, Causes & Advocacy 1
10 observances

All observances on this date

Source-backedEdition SpecificIn-depth guide

Assyrian New Year (Akito)

1 April in the Kurdistan Region’s 2026 calendar · Assyrian/Babylonian New Year (Akitu) cultural celebration; April 1 has current official recognition in the Kurdistan Region, with broader community practice not reduced to one jurisdiction.

Kurdistan Region sources list Assyrian New Year (Akito) on April 1 in the 2026 official calendar, declare April 1, 2026 a regional government holiday, and preserve consecutive presidential…

Source-backedRule Based AnnualIn-depth guide

Childhelp National Day of Hope

First Wednesday of April · United States child-abuse prevention and survivor-support awareness observance

Childhelp; congressional recognition cited by the organizer

Source-backedFixed AnnualIn-depth guide

Cyprus National Day

1 April · Cyprus / public-holiday calendar

Official Cyprus diplomatic material lists Cyprus National Day on 1 April among the country’s public holidays.

Source-backedFixed AnnualIn-depth guide

International Edible Book Festival / Edible Book Day

1 April · International participatory book-art/food event

The Books2Eat creator site identifies Judith A. Hoffberg and Béatrice Coron as the creators and explains the April 1 date for the International Edible Book Festival.

Source-backedFixed AnnualIn-depth guide

National Greeting Card Day

1 April · United States / Lovepop-created greeting-card observance

National Day Archives records Lovepop Cards as creator in March 2021 for an annual April 1 observance; Lovepop first-party material ties April 1 to its April 1, 2014 launch anniversary and…

Source-backedRule Based AnnualIn-depth guide

National Walking Day

First Wednesday in April · United States / American Heart Association physical-activity awareness observance

The American Heart Association states that it established National Walking Day in 2007 and celebrates it annually on the first Wednesday in April; current 2026 material confirms continuing…

Source-backedFixed AnnualIn-depth guide

Odisha Day (Utkala Dibasa)

1 April · Odisha state observance

Chief Minister of Odisha / Government of Odisha

Source-backedRule Based AnnualIn-depth guide

Paraprofessional Appreciation Day

First Wednesday of April (1 April in 2026) · United States / education-community appreciation observance

AFT and Colorado Education Association materials verify Paraprofessional Appreciation Day and the first-Wednesday-in-April recurrence.

Source-backedFixed AnnualIn-depth guide

U.S. Air Force Academy founding anniversary

1 April annually — founding anniversary, not federal holiday · United States / U.S. Air Force Academy institutional history

The U.S. Air Force Academy’s official history states that the Academy was established on April 1, 1954. The source supports an institutional anniversary, not a distinct nationwide recurring…

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 →