It is considered a matter of neutrality, a national holiday like the 4th of July in the US, President's Day, Veterans Day, Labor Day.
But I know many jws that get together with friends and eat turkey and or around that day.
*** g76 11/22 p. 13 A National "Day of Thanks"—The Dream and the Reality ***Naturally, many dedicated Christians will not be working secularly on that day. Some may choose to take advantage of this opportunity to enjoy fellowship with family and friends. Yet, what "spirit" will a Christian manifest? It is true that God created turkeys and other foods, so these are not in themselves objectionable. But undoubtedly one who is a true Christian will want to be careful not to stumble others.
Consider what the apostle Paul says, as recorded in First Corinthians, chapter ten. He reasons that Christians should wisely avoid eating before others a perfectly acceptable food if doing so would stumble them. ‘Respect your brother’s conscience’ is the message.