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National days, ongoing national weeks and months, and global observances for March 21, 2026. Plus historical events and birthdays.
These observances run for a full week; this calendar day falls inside the week.
These observances last the full month; this date is part of that month-long celebration.
Showing the first 12 on this date; there are more month-long observances. See the full months list for March.
International and other global observances on this date (may include days, weeks, or months).
Events that occurred on March 21 throughout history
The first active-duty Navy woman, Loretta Walsh receives the rank of petty officer. She's the first woman enlisted in the United States Armed Forces in a non-nurse capacity.
The Federal Bureau of Prisons closes Alcatraz Federal Penitentiary located on an island off the coast of San Francisco, California. The maximum-security prison is also known as The Rock housed some of the country's most notorious criminals including Al Capone, Robert "Birdman of Alcatraz" Stroud, George "Machine Gun" Kelly, and Alvin Karpis.
The Mayor of San Francisco, Joseph Alioto proclaims the first Earth Day.
Someone shoots J.R. on the popular television series Dallas.
Jack Dorsey, one of Twitter's cofounders, sent the first public tweet. It read, "just setting up my twttr."
