July 6, 1845
The First Congregational Church at Johnstown Village was organized by Rev. Stephen Peet.
Nation and worldGrade A · 1 independent source
The evidence
“The Ist Congregational Church at Johnstown Village organized July 6th, 1845, by Rev, Stephen Peet, then agent of the Am. Home Mis.”
1856-history-of-rock-county/10-johnstown.md, PDF p. 103 / book p. 85
Guernsey, Orrin, and Josiah F. Willard, editors. History of Rock County, and Transactions of the Rock County Agricultural Society and Mechanics' Institute. Janesville, Wis.: William M. Doty & Brother, 1856. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871593.
Grade A: Found on a page of one of our sources