At the end of which season the daughters of Airitech would come out of the Cave of Cruachan every year?
Samhain Samhain (pronounced or , ] ) is a Gaelic festival marking the end of the harvest season and the beginning of winter or the "darker half" of the year. Traditionally, it is celebrated from 31 October to 1 November, as the Celtic day began and ended at sunset. This is about halfway between the autumn equinox and the winter solstice. It is one of the four Gaelic seasonal festivals, along with Imbolc, Bealtaine and Lughnasadh. Historically, it was widely observed throughout Ireland, Scotland and the Isle of Man. Similar festivals are held at the same time of year in other Celtic lands; for example the Brythonic Calan Gaeaf (in Wales), Kalan Gwav (in Cornwall), and Kalan Goañv (in Brittany).
Corca Oíche The Corca Oíche, meaning "the race of Oíche" (also Corco Óchae, Corcu Oche, Corco Che, Corcuighe, Corcoiche) was an ancient tribe, possibly of Pictish origin, existing since pre-Christian times in Ireland. It is possible that they descend from the Cruthin, a people whose territory existed near Lough Neagh in north-east Ireland. As such, some sources claim that they descended from the semi-legendary hero Dubthach Dóeltenga, or more commonly that they are descended from Oíche or Óchae, the daughter of Cronn Badhraoi of the Dál nAraidi, and her son Fergus Foga last king of the Ulaid to rule at Emain Macha.