The carolling in this area (call it the South Pennines if you like) starts after Armistice Sunday (not the first Sunday after Armistice as is mistakenly sometimes thought). To be even more precise, they sing at the Black Bull at Ecclesfield starting on the Thursday after Armistice Sunday, the Traveller's at Oughtibridge on the Saturday and the Royal Hotel Dungworth and the Blue Ball Worrall on the Sunday.

"Jacob's Well" is indeed central to the tradition and is used (to answer Joe's original query) as a carol at Christmas. A number of other songs are sung at this time which really have, well let's say not a lot to do with Xmas. It should be noted the repertoire in Dungworth has changed since I started going there in 1972.

Details of the current repertoire of the Glen Rock Carolers and when the songs were added can be found here.