Perhaps Palm Sunday or Easter
*“Unitarian” was added to the church’s name a couple decades after the 1961 consolidation of the American Unitarian Association and Universalist Church of America (UCA). Info on the photo backs refer to the church as a “Society.” My guess is that whoever wrote that had memory of the church stretching back into the late 19thC when the church was still, officially speaking, registered with the UCA as a society (aka, before the community had a physical church & ordained pastor). Photo source: Andover-Harvard Theological Library at Harvard Divinity School, Cambridge MA
