United States anniversaries
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- 1805 – United States Marines and Berbers attack the Tripolitan city of Derna during the First Barbary War. The line "shores of Tripoli" in the Marines' hymn is a reference to the battle.
- 1861 – President Abraham Lincoln suspends the writ of habeas corpus.
- 1865 – The New York State Senate creates Cornell University (pictured) as the state's land grant institution.
- 1911 – Following the resignation and death of William P. Frye, a compromise is reached to rotate the office of President pro tempore of the United States Senate.
- 1981 – Xerox PARC introduces the computer mouse.
- 2006 – Construction begins on the Freedom Tower for the new World Trade Center in New York City.
Usage
These United States "Anniversaries for <date>" (e.g., April 27) subpages are displayed using {{CURRENTMONTHNAME}} {{CURRENTDAY}}.
- The layout design for these subpages is at Portal:United States/Anniversaries/Layout.
- Add a new anniversary to the applicable day of the month shown below.
United States anniversaries by month
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Single page version (long)
Nominations
Feel free to add undisplayed United States-related anniversaries from these resources.
- Daily U.S. portal "Anniversaries" pages, such as Portal:United States/Anniversaries/April/April 27.
- Daily U.S. portal "On this day" pages, such as Portal:United States/On this day/April 27.
- Yearly "...in the United States" articles, such as 2024 in the United States.
- Day of the month articles, such as April 27.
- Month of the year articles, such as April 2024.
- Year articles, such as 2024.
United States-related anniversaries should be included in at least one of the calendar-based articles listed above before they are included here. Possible sources for developing additional calendar-based anniversary items are listed below.