Here are the rich prayers of the Thanksgiving Day Mass, for us in the U.S. to reflect upon on this day.

Collect:

Father, all-powerful,
your gifts of love are countless
and your goodness infinite:
as we come before you on Thanksgiving Day
with gratitude for your kindness,
open our hearts to have concern
for every man, woman, and child,
so that we may share your gifts in loving service.
Through our Lord Jesus Christ, your Son,
who lives and reigns with you in the unity of the Holy Spirit,
one God, for ever and ever.

Prayer over the Offerings:

God our Father,
from whose hand we have received generous gifts
so that we might learn to share your blessings in gratitude,
accept these gifts of bread and wine,
and let hte perfect sacrifice of Jesus
draw us closer to all our brothers and sisters in the human family.
Through Christ our Lord.

The Preface:

You have entrusted to us
the great gift of freedomm,
a gift that calls forth
responsibility and commitment
to the truth that all have a fundamental dignity before you.
In Jesus, through his Death and Resurrection,
we find our ultimate redemption,
freedom from sin,
and every blessing.

Prayer after Communion:

In this celebration, O Lord our God,
you have shown us the depths of your love for all your children;
help us, we pray, to reach out in love to all your people,
so that we may share with them
the good things of time and eternity.
Through Christ our Lord.

New English translation according to the Third Typical Edition of the Roman Missal. 2010,
Copyright International Commission on English in the Liturgy.