In 1863, President Abraham Lincoln issued a proclamation declaring November 26 as a national day of Thanksgiving. This monumental decision was shaped by the context of the ongoing Civil War, where the nation was deeply divided and suffering. Sarah Josepha Hale, a prominent writer and editor, had long been advocating for a national Thanksgiving holiday. Lincoln recognized the potential of such a day to bring unity and solace to the war-torn nation. He hoped to promote a spirit of gratitude and healing among the American people. The proclamation invited citizens to observe the day through feasting and resting, allowing them to reflect on their blessings, particularly during challenging times. Lincoln's proclamation marked the establishment of Thanksgiving as an official holiday for the first time, emphasizing the importance of national unity and gratitude.

Following the proclamation, Thanksgiving began to be celebrated in various states, and the tradition rapidly gained momentum. However, the date of celebration varied significantly until November 1939, when President Franklin D. Roosevelt moved Thanksgiving to the third Thursday in November in an attempt to boost the economy during the Great Depression, leading to significant controversy and confusion. This period, known as 'Franksgiving,' lasted until 1941, when the U.S. Congress decided in favor of a standard Thanksgiving observance on the fourth Thursday of November. This decision was made to eliminate the confusion and establish consistency in the celebration of the holiday, highlighting the importance of Thanksgiving in American culture and its evolution over time.