List of presidents of the United States by time in office
List of presidents of the United States by time in office
<table><thead><tr><th>Longest presidency</th><th>Shortest presidency</th></tr></thead><tbody><tr><td>Franklin D. Roosevelt 4,422 days (1933–1945)</td><td>William Henry Harrison 31 days (1841)</td></tr></tbody></table>
List of presidents of the United States by time in office
The length of a full four-year term of office for a president of the United States usually amounts to 1,461 days (three common years of 365 days plus one leap year of 366 days). The listed number of days is calculated as the difference between dates, which counts the number of calendar days except the first day (day zero). If the first day were included, all numbers would be one day more, except Grover Cleveland would have two more days, as he served two full nonconsecutive terms.
List of presidents of the United States by time in office
Of the individuals elected president, four died of natural causes while in office (William Henry Harrison, Zachary Taylor, Warren G. Harding, and Franklin D. Roosevelt), four were assassinated (Abraham Lincoln, James A. Garfield, William McKinley, and John F. Kennedy), and one resigned from office (Richard Nixon).
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