As the first cross-quarter day following Midwinter this day falls on the first of February and traditionally marks the first stirrings of spring. It aligns with the contemporary observance of Groundhog Day. It is time for purification and spring cleaning in anticipation of the year's new life. In Rome, it was historically a shepherd's holiday, while the Celts associated it with the onset of ewes' lactation, prior to birthing the spring lambs.
For Celtic pagans, the festival is dedicated to the goddess Brigid, daughter of The Dagda and one of the Tuatha Dé Danann.
Among reclaiming tradition Witches, this is the traditional time for pledges and rededications for the coming year and for initiation among Dianic Wiccans.
Content taken from Wikipedia, whilst we find the time to translate the information into a more pagan format