The third week in October, annually. Yarm Fair is held in High Street, Yarm, in the Borough of Stockton-on-Tees, North Yorkshire, England.
Article about the history of Yarm Fair from Calendar Customs     https://calendarcustoms.com/articles/yarm-fair/

YARM FAIR   Various recordings on YouTube       https://www.youtube.com/results?search_query=yarm+fair+song