Thank you Sarah: The inspiring story of how Thanksgiving began

The outbreak of war in April 1861 did little to stop Sarah Josepha Hale’s efforts to create such a holiday, however. She continued to write editorials on the subject, urging Americans to “put aside sectional feelings and local incidents” and rally around the unifying cause of Thanksgiving. And the holiday had continued, despite hostilities, in both the Union and the Confederacy.
In 1861 and 1862, Confederate President Jefferson Davis had issued Thanksgiving Day proclamations following Southern victories.
Abraham Lincoln himself called for a day of thanks in April 1862, following Union victories at Fort Donelson, Fort Henry and at Shiloh, and again in the summer of 1863 after the Battle of Gettysburg.
Shortly after Lincoln’s summer proclamation, Hale wrote to both the president and Secretary of State William Seward, once again urging them to declare a national Thanksgiving, stating that only the chief executive had the power to make the holiday, “permanently, an American custom and institution.”
Whether Lincoln was already predisposed to issue such a proclamation before receiving Hale’s letter of September 28 remains unclear. What is certain is that within a week, Seward had drafted Lincoln’s official proclamation fixing the national observation of Thanksgiving on the final Thursday in November, a move the two men hoped would help “heal the wounds of the nation.”