Schwenkfelder Thanksgiving is celebrated annually on September 24.
The Schwekfelders are the descendants of a small Protestant sect that sprang up in Germany around the time of the Reformation. They were followers of Caspar Schwenkfeld, a theologian. He and his followers separated themselves from Protestant circles and formed the brotherhoods that still survive as the Schwenkfelder Church. Most Schwenkfelders now live in Pennsylvania Dutch country.