St Marwenna is thought to have lived and preached in the fifth century AD. She is said to have been one of 24 children of St Brychan, who was also ruler of the Welsh kingdom of Brycheiniog. During the day, children from the local primary school choose a Revel Queen, who is joined by attendants dressed in white. Before the revel procession the queen is crowned by “Old Father Time” and mounts a white pony, which leads a band and a number of boys who carry bows of greenery cut from trees.
There are other activities during the day including a pram race and a number of stalls. Most of the villagers wear colourful flower buttonholes to mark the special occasion.