Great Celtic fair (1rst of May ). It’s the beginning of the Hot Season, the entrance in the world of daily activities and of the light. The Great Mother is particularly honoured in the shape of Dana, gods’mother and wife of Oak King. Oak and fern are the symbols of this fair. During this night, they light very big fires. The first fire who burn have to be the one on Tara Hill. It’s the birthday too of landing of Tuatha and Partholon’s people in Ireland.