Lugh
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Lugh (pronounced loo) is an Irish deity, represented in mythological texts as a hero of the distant past and a leader of the Tuatha Dé Danann (people of the goddess Danu). He is known variously as Lámhfhada (long hand), for his skill with a spear or sling, or as Samh-ildánach (skilled in many arts).
As well as being a patron of all crafts, Lugh is often considered a sun god, represented by solar imagery.
Lughnasadh
Lugh instituted a harvest fair at the beginning of August to commemorate his foster-mother Tailtiu, at the town that bears her name (now Teltown, County Meath). This festival, which became known as Lughnasadh (pronounced loo-nuh-sah), included events such as horse races and displays of martial arts.
Symbolically, Lughnasadh is a celebration of Lugh's triumph over the spirits of the Other World who had tried to keep the harvest for themselves. It survived long into Christian times and is still celebrated under a variety of names, including Lammas.