Lughnasadh, or Lammas a Cross-Quarter Day of the year
http://www.wilsonsalmanac.com/book/aug1.html Lá Lúnasa, the traditional first day of autumn in Ireland.
The modern date for Lughnasadh, as for the other great Celtic festivals, Imbolc, Beltane and Samhain, is only an approximation made necessary by a solar calendar. In Ireland, the festival began in mid-July, and lasted till mid-August, but its main focus was August 1. In the (Ásatrú) (Asatru) tradition, that day is sacred to the Norse deities Odin and Frigg; celebrants used to ascend the spiral path of the Lammas hill, on way to Lammas festivities ...
Categories: lammas, celtic, calendar-customs