Traditions would start the night before ("Nos Galan Haf") with bonfires, and is considered a "Ysbrydnos" or "spirit night" when people would gather hawthorn ("draenen wen") and flowers to decorate their houses, celebrating new growth and fertility. While on May Day celebrations would include summer dancing ("dawnsio haf") and May carols ("carolau mai" or "carolau haf") othertimes referred to as "singing under the wall" ("canu dan y pared)," May Day was also a time for officially opening a village green (twmpath chwarae).