List of days of the year
The following pages, corresponding to the Gregorian calendar, list the historical events, births, deaths, and holidays and observances of the specified day of the year:
Footnotes
- February 29 only occurs every four years on leap years. This day is added to the calendar as a corrective measure because the Earth does not orbit the Sun in precisely 365 days.
External links
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Wikimedia Commons has media related to October 21.
- On This Day
- BBC: On This Day
- The New York Times: On This Day
- Library of Congress: Today in History
- History Channel (US): This Day in History
- History Channel (UK): This Day in History
- New Zealand Government: Today in New Zealand History
- Computer History Museum: This Day in History
- Internet Movie Database: This Day in Movie History
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