First Official Thanksgiving Proclamation

It is therefore recommended… to set apart Thursday the eighteenth day of December next, for solemn thanksgiving and praise, that with one heart and one voice the good people may express the grateful feelings of their hearts and consecrate themselves to the service of their divine benefactor.

Samuel Adams,October 14, 1789

Oh, give thanks to the LORD, for He is good! For His mercy endures forever. 1 Chronicles 16:34

It is good to give thanks to the LORD, And to sing praises to Your name, O Most High; Psalm 92:1