Psalms 90-100 are prophetic, having a definite time progression, especially referencing the time frame between the Feast of Trumpets to the Last Great Day.
Few families reminisce about the Pilgrims and the Native Americans sharing a meal; some pundits suggest that this is a time to keep the holiday in isolation.
Sacrifices of thanksgiving, praise, and gratitude are required of God's called out priests. By meditating on the right things, we prepare ourselves for prayer.
God has provided the God-plane marriage relationship to teach us how to submit to one another, sacrificing our self-centeredness for the benefit of our spouse.
We cannot emulate the nine ungrateful lepers, but must be proactive in our expressions of thanksgiving, such as making lists of things for which we are thankful.