Nothing Says "Happy Thanksgiving" Better Than The Eucharist!
Greek eucharistia = thanksgiving
The ancient title "Eucharistia" appears in writers as early as Ignatius, Justin Martyr and Irenæus from the second century onward. The Eucharist was later described by Augustine as the Blessed Sacrament of the Altar.
Since the earliest days of the Church, the Eucharist has occupied a central aspect of worship and devotion as evidenced by the writings of the Church Fathers. The book of Acts described it as the " the breaking of the bread." Further on in the NT, St. Paul talks about the Mass in Corinthians and warns the faithful that their very lives could be placed in jeopardy if they partake of the Eucharist in an unworthy fashion, wrong motives, etc. Finally, the book of Revelation is a symbolic representation of the Mass .(See Scott Hahn's The Lamb's Supper)
May God bless you this day as you give thanks for all God's blessings in our lives, and most especially His gift to us of the Eucharist.