In British and Irish tradition, the quarter days were the four dates in each year on which servants were hired, school terms started, and rents were due. They fell on four religious festivals roughly three months apart and close to the two solstices and two equinoxes.

Imbolc or Imbolg, also called Saint Brigid's Day, is a Gaelic traditional festival. It marks the beginning of spring, and for Christians, it is the feast day of Saint Brigid, Ireland's patroness saint. Its traditional date is 1 February, about halfway between the winter solstice and the spring equinox. Historically, its traditions were widely observed throughout Ireland, Scotland and the Isle of Man. Imbolc is one of the four Gaelic seasonal festivals, along with: Beltane, Lughnasadh and Samhain.