How many national and international days are celebrated in April?

April spans 30 calendar days and includes both fixed-date observances (celebrated on the exact same calendar number every year) and floating holidays (calculated by weekday, such as the first Friday or third Sunday of April). Every single day in April hosts at least one recognized national, world, or awareness day.

Why do some April national days change dates from year to year?

While most April holidays are anchored to a fixed calendar date, several civic and culinary observances are defined by a weekday rule—for example, the first Monday or third Friday of April. Our 2026 calendar automatically calculates the exact date for the current year and lists future occurrences on each observance page.

Who establishes official national and international days in April?

International and World Days in April are typically designated by the United Nations General Assembly, UNESCO, or the World Health Organization to advance global public awareness. National Days originate from congressional or presidential proclamations, cultural heritage institutions, agricultural councils, and historical societies.

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