05/23/1920
https://www.presidency.ucsb.edu...
"The year that has elapsed since we last observed our day of thanksgiving has been rich in blessings to us as a people."
"Now, Therefore, I, Woodrow Wilson, President of the United States of America, do appoint Thursday, the thirtieth of November, as a day of National Thanksgiving and Prayer."
"It has long been the custom of our people to turn in the fruitful autumn of the year in praise and thanksgiving to Almighty God for His many blessings and mercies to us as a nation."
"By virtue of the authority vested in me by law, it is hereby ordered:"