The new United States celebrates its first national day of thanksgiving on Thursday, December 18, 1777, commemorating the American victory at the Battle of Saratoga after the surrender of General John Burgoyne and 5,000 British troops in October 1777.

In proclaiming the first national day of thanksgiving, Congress wrote,

FORASMUCH as it is the indispensable Duty of all Men to adore the superintending Providence of Almighty God; to acknowledge with Gratitude their Obligation to him for benefits received, and to implore such farther Blessings as they stand in Need of;  And it having pleased him in his abundant Mercy not only to continue to us the innumerable Bounties of his common Providence, but also to smile upon us in the Prosecution of a just and necessary War, for the Defence and Establishment of our unalienable Rights and Liberties; particularly in that he hath been pleased in so great a Measure to prosper the Means used for the Support of our Troops and to crown our Arms with most signal success: