World Meteorological Day

United Nations observance

World Meteorological Day marks the anniversary of the World Meteorological Organization's establishment on March 23, 1950.

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World Tuberculosis Day

3/24/2026

United Nations observance

World Tuberculosis Day is annually held on March 24 to raise awareness of tuberculosis and ways to eradicate the disease.

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International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims

3/24/2026

United Nations observance

March 24 is the UN’s International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims

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International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade

3/25/2026

United Nations observance

The International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade remembers the lives of Africans who were forced into slavery in North, Central and South America.

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International Day of Solidarity with Detained and Missing Staff Members

3/25/2026

United Nations observance

The UN’s International Day of Solidarity with Detained and Missing Staff Members is annually held on March 25.

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Maryland Day

3/25/2026

State Observance

Maryland Day commemorates the arrival of Lord Baltimore and the first colonists in Maryland, the United States, in the 17th century.

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