Thanksgiving....

Continental Congress, November 1, 1777
The First National Proclamation of Thanksgiving:
"For asmuch 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 further blessing 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.. .to smile upon us as in the prosecution of a just and necessary war for the defense and establishment of our unalienable rights and liberties...

It is therefore recommended to the legislative or executive powers of these United States, to set apart Thursday, the eighteenth day of December next, for the 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; and that together with their sincere acknowledgements and offerings, they may join the penitent confession of their manifold sins, whereby they had forfeited every favour, and their humble and earnest supplication that it may please God, through the merits of Jesus Christ, mercifully to forgive and blot them out of remembrance;

That it may please Him graciously to afford His blessings on the governments of these states respectively, and prosper the public council of the whole; to inspire our commanders both by land and sea, and all under them, with that wisdom and fortitude which may render them fit instruments, under the Providence of Almighty God, to secure for these United States, the greatest of all human blessings, independence and peace;
That it may please Him, to prosper the trade and manufactures of the people, and the labour of the husbandman, that our land may yet yield its increase; to take school and seminaries of education, so necessary for cultivating the principles of true liberty, virtue and piety, under His nurturing hand, and to prosper the means of religion for the promotion and enlargement of that kingdom which consisteth “in righteous, peace and joy in the Holy Ghost.”
And it is further recommended, that servile labour, and such recreation as, though at other times innocent, may be unbecoming the purpose of this appointment, be omitted on so solemn an occasion.
(America's God and Country (2000) William J. Federer :147)