So James Pierpont, the guy who wrote “Jingle Bells,” was a Unitarian, and worked as the music director at the Unitarian church in Savannah, Georgia, before the Civil War — and before that church has to close down because it leaned strongly Abolitionist. But “Jingle Bells” is not in any Unitarian Universalist hymnal. If you want to sing it during a Sunday service, here’s an arrangement laid out on a half-letter-size sheet, that you can stick into the typical order of service:
(This arrangement is from an early edition of Pierpont’s sheet music, available online at the Library of Congress.)