Cross-quarter days

Samhain ( , ; ; ) or '''' () is a Gaelic festival on 1 November marking the end of the harvest season in autumn and beginning of winter or the "darker half" of the year. It is also the Irish and Scottish Gaelic name for November. Celebrations begin on the evening of 31 October, since the Celtic day began and ended at sunset. This is about halfway between the autumnal equinox and winter solstice. It is one of the four Gaelic seasonal festivals along with Imbolc, Bealtaine, and Lughnasa. Historically it originated in Ireland and it was widely observed throughout Ireland, Scotland, and the Isle o

Imbolc or Imbolg (), also called '''Saint Brigid's Day''' (; ; ), is a Gaelic traditional festival on 1 February. It marks the beginning of spring and is the feast day of Saint Brigid, Ireland's patroness saint. Historically, its many folk traditions were widely observed throughout Ireland, Scotland and the Isle of Man. Imbolc falls about halfway between the winter solstice and the spring equinox and is one of the four Gaelic seasonal festivals, along with Bealtaine, Lughnasadh and Samhain.

Beltane ( ) or Bealtaine () is the Gaelic May Day festival, marking the beginning of summer. It is traditionally held on 1 May, or about midway between the spring equinox and summer solstice.

Lughnasadh, Lughnasa or Lúnasa ( , ) is a Gaelic festival marking the beginning of the harvest season. Historically, it was widely observed throughout Ireland, Scotland, and the Isle of Man. Traditionally, it is held on 1 August, or about halfway between the summer solstice and autumn equinox. In recent centuries, some celebrations have shifted to Sundays near this date. Lughnasadh is one of the four Gaelic seasonal festivals, along with Samhain, Imbolc, and Beltane. It corresponds to the Welsh and the English Lammas.