World Intellectual Property Day

United Nations observance

World Intellectual Property Day is annually held on April 26 to increase awareness and understanding of intellectual property worldwide.

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International Chernobyl Disaster Remembrance Day

United Nations observance

International Chernobyl Disaster Remembrance Day is a UN holiday designed to raise awareness of the consequences of the 1986 nuclear accident.

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State Holiday

State Observance

State Holiday is a state observance in the USA

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World Day for Safety and Health at Work

4/28/2025

United Nations observance

The World Day for Safety and Health at Work is observed on April 28 each year.

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Arbor Day

4/28/2025

State Observance

Arbor Day is a state observance in the USA

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International Jazz Day

4/30/2025

United Nations observance

International Jazz Day recognizes the historical, cultural, and educational contribution of jazz.

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Yom Ha'atzmaut

5/1/2025

Jewish holiday

Many Jewish communities in the United States celebrate Yom Ha’Atzmaut, which is Israel’s Independence Day, on the fifth day of the month of Iyar in the Jewish calendar.

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Law Day

5/1/2025

Observance

Law Day in the United States is annually held on May 1.

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