We can learn from history, if we don't rely too much on mass media.
We have all heard the popular story of the first thanksgiving feast of 1621, when the pilgrims celebrated their first harvest. We only assume they ate turkey.
Edward Winslow reported it like this: Our harvest being gotten in, our governor sent four men on fowling, that so we might after a special manner rejoice together after we had gathered the fruit of our labors. They four in one day killed as much fowl as, with a little help beside, served the company almost a week. At which time, among other recreations, we exercised our arms, many of the Indians coming amongst us, and among the rest their greatest king Massasoit, with some 90 men, whom for three days we entertained and feasted, and they went out and killed five deer, which they brought to the plantation and bestowed upon our governor, and upon the captain, and others. And although it be not always so plentiful as it was at this time with us, yet by the goodness of God, we are so far from want that we often wish you partakers of our plenty.
For some reason we hear little about the following proclamation by the Congress made at Philadelphia on Oct. 11, 1782.
IT being the indispensable duty of all Nations, not only to offer up their supplications to ALMIGHTY GOD, the giver of all good, for his gracious assistance in a time of distress, but also in a solemn and public manner to give him praise for his goodness in general, and especially for great and signal interpositions of his providence in their behalf: Therefore the United States in Congress assembled, taking into their consideration the many instances of divine goodness to these States, in the course of the important conflict in which they have been so long engaged; the present happy and promising state of public affairs; and the events of the war, in the course of the year now drawing to a close; particularly the harmony of the public Councils, which is so necessary to the success of the public cause; the perfect union and good understanding which has hitherto subsisted between them and their Allies, notwithstanding the artful and unwearied attempts of the common enemy to divide them; the success of the arms of the United States, and those of their Allies, and the acknowledgment of their independence by another European power, whose friendship and commerce must be of great and lasting advantage to these States: � Do hereby recommend to the inhabitants of these States in general, to observe, and request the several States to interpose their authority in appointing and commanding the observation of THURSDAY the twenty-eight day of NOVEMBER next, as a day of solemn THANKSGIVING to GOD for all his mercies: and they do further recommend to all ranks, to testify to their gratitude to GOD for his goodness, by a cheerful obedience of his laws, and by promoting, each in his station, and by his influence, the practice of true and undefiled religion, which is the great foundation of public prosperity and national happiness.
In those days, the federal government did not order citizens to take a day off. They sent their declaration to the states. The states also just passed it along.
Some states responded like New Hampshire, which printed the proclamation and sent it to "worshiping assemblies" with a suggestion that a day of thanksgiving be observed, when "citizens abstain from all servile labor thereon."
That's not the whole story of Thanksgiving, but its worth knowing in a land of self government.