World Bee Day

United Nations observance

World Bee Day is a United Nations observance in the USA

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World Autoimmune / Autoinflammatory Arthritis Day

Worldwide observance

World Autoimmune / Autoinflammatory Arthritis Day is a worldwide observance in the USA

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Emergency Medical Services for Children Day

Observance

Emergency Medical Services for Children (EMSC) Day is observed on the Wednesday of Emergency Medical Services (EMS) Week, May 19–25, in the United States.

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World Day for Cultural Diversity for Dialogue and Development

5/21/2026

United Nations observance

The World Day for Cultural Diversity for Dialogue and Development, held on May 21, is an occasion for people to deepen their understanding of cultural diversity.

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International Tea Day

5/21/2026

United Nations observance

International Tea Day is a United Nations observance in the USA

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Shavuot

5/22/2026

Jewish holiday

Shavuot, also known as the Festival of Weeks, is one of three major Jewish festivals.

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International Day for Biological Diversity

5/22/2026

United Nations observance

The International Day for Biological Diversity is an occasion to increase the global understanding and awareness of issues and challenges around biodiversity.

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National Maritime Day

5/22/2026

Observance

National Maritime Day is annually observed in the United States on May 22. It is a time to observe its maritime heritage, to honor those who served as merchant mariners, and to recognize the benefits of the maritime industry.

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