In many parts of Wales, Christmas meant rising early (or staying up overnight) to attend the plygain service at the parish church. The hour for the plygain appears to have varied between 3 a.m. and 6 a.m., the latter becoming more common as time went on. To await the service, young people, in particular, would pass away the time in one way or another.
In some country districts they would gather at certain farmhouses to make cyflaith (treacle toffee) and spend the night merrily, decorating the houses with holly and mistletoe, as at Marford, Flintshire, in the 1830's. According to Mrs. Thrale's journal of a tour in 1774 the inhabitants of Dyffryn Clwyd kindled their lights at two in the morning and sang and danced to the harp until the plygain.