Context: The Burning of Washington was a British invasion of Washington, D.C., the capital of the United States, during the War of 1812. On August 24, 1814, after defeating the Americans at the Battle of Bladensburg, a British force led by Major General Robert Ross occupied Washington and set fire to many public buildings, including the White House (known as the Presidential Mansion), and the Capitol, as well as other facilities of the U.S. government. The attack was in part a retaliation for the recent American destruction of Port Dover in Upper Canada. Throughout the history of the United States, the United Kingdom is the only country to have ever captured Washington, D.C.; the Burning of Washington also marks the only time since the American Revolutionary War that a foreign power has captured and occupied the United States capital.

Question: when did the british burn down washington dc?
Steam of consciousness below:
To answer this question, we should know that: On August 24, 1814, after defeating the Americans at the Battle of Bladensburg, a British force led by Major General Robert Ross occupied Washington and set fire to many public buildings, including the White House (known as the Presidential Mansion), and the Capitol, as well as other facilities of the U.S. government.
So, the answer is August 24 , 1814.