The central meaning of this ceremony is Lugh and his inauguration as a king, and consequently his marriage with Erin, the Irish Goddess who represent the Land and gives name to the Ireland, Eire. The major site of ancient Irish fairs was in Tailtiu at Lughnasadh because it was an assembly organized and presided by the King of Tara, and Lugh was the High-king in the first mythological Lughnasadh times. On this day also occurred the first Fair of Tailtiu that was made in honor of his dead foster-mother which marks the importance of Lugh’s myth as the center of this feast.
In the Celtic culture when a king was crowned he makes a ceremonial marriage with the Land, so Lugh being the King is the keeper of the fertility of the Land and responsible for giving and distributing the richness of the Land. He also promoted the equilibrium of the society and of nature and it is exactly what he does after the battle when he makes the deal with Bres which provides prosperity to the people of Ireland, in exchange for Bres’ life.
Lugh as giving King and a solar God, represent the fecundity and productiveness of the soil, and his marriage with Erin proves this. So Lughnasadh is the cult of three aspects of Lugh: the mythological Lugh as a champion who defends the community from a dangerous enemy, the cult of the High king as a generous ruler responsible for the sharing of the prosperity with the people and the cult of the God as an ally in the fecundity process.
The Assembly of Lugh is a Harvest feast, the time of the cutting and the storage of the grain, the ceremonial banquets, the fairs, the bull sacrifice and the ritual renovation of Lugh’s saga. Its traditional festivities varied from picking of bilberries, making of garlands, rural assemblies for sports, courting, and marriages to swimming of horses. And it was, for the first trifunctional class, the day to start harvesting too. This was a feast were all the trifunctional classes were highly involved, for the Druids were assisting the rites, the warriors were competing in honor to Lugh and the farmers were attending the harvest cult.