Whatever about that, for many centuries they observed four focal points
in the pastoral year, each roughly equidistant from a solstice and an
equinox, Imbolc, Bealtaine, Lughnasa and Samhain. The latter three are
remembered in the Irish names for May, August and November but Imbolc,
the celebration of ewes giving birth and feeding their lambs was
christianised as Lá Fhéile Brigide, the feast day of Brigid on February
1st.
http://www.irishtimes.com/culture/heritage/an-irishman-s-diary-on-st-brigid-1.2080162
