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To complicate matters, Washington was actually born on February 11 in 1731! How can that be? During Washington's lifetime, people in Great Britain and America switched from the Julian to the Gregorian calendar (something most of Europe had done in 1582).
History & Grounds. On April 30, 1789, George Washington, standing on the balcony of Federal Hall on Wall Street in New York, took his oath of office as the first President of the United States.he Presidential biographies on WhiteHouse.gov are from âThe Presidents of the United States of America,â by Frank Freidel and Hugh Sidey. Copyright 2006 by the White House Historical Association. Learn more about George Washington's spouse, Martha Dandridge Custis Washington.