Definition of "Imbolc"

[T]hat the ancient Irish, at some remote period, did divide the year into the three seasons of Samh, summer, Gamh, winter, and Imbolc, spring (omitting the Foghmhar, or autumn), is quite evident from the fact, that Cormac Mac Cuileannain and the other old glossarists, explain Samhain, or November eve, by Samh, summer, and fuin, the end; that is, the end of Samh, or summer.

1862 June 10, Eugene O’Curry, “Lecture XXX. [Of Music and Musical Instruments in Ancient Erinn.]”, in W. K. Sullivan, editor, On the Manners and Customs of the Ancient Irish. A Series of Lectures, volume III (Lectures, Vol. II), London, Edinburgh: Williams and Norgate; Dublin: W. B. Kelly; New York, N.Y.: Scribner, Welford, & Co., published 1873, page 217

Invite, but never command, friendly spirits, faeries, or elementals to join you as you wish. In some traditons it is common to invite ancestors to join you, especially during the dark days from Samhain to Imbolg when it is believed that the portal between our dimensions is at its thinnest.

1994, Edain McCoy, “Appendix Three: Outline for Ritual Construction”, in A Witch’s Guide to Faery Folk: How to Work with the Elemental World: […], St. Paul, Minn.: Llewellyn Publishers, published 2004 (13th printing), page 354

In the Celtic world many celebrations were built around the ancient calendar of events or great feasts. The four great feasts of the year were Samhain (1st November), Imbolg (1st February), Bealtaine (1st May) and Lughnasa (1st August). Notice that each of the feasts begins each of the four seasons of the year – winter, spring, summer and autumn.

2002, Liam Lawton, “How Can I Repay the Lord”, in Song of My People, Dublin: Veritas Publications, page 28

The Festival of Imbolc commences on February eve, or January 31, and usually concludes on February 2. Imbolc has three major associations: the veneration of fire and water, the quickening of new life in the womb, and the lactation of ewes. The association of Imbolc with fire comes from its place as the midpoint between the winter solstice and the vernal equinox.

2007, Judy Ann Nock, “Season Three: Imbolc: First Light in the Dark of Winter”, in The Provenance Press Guide to the Wiccan Year: Spells, Rituals, Holiday Celebrations, Avon, Mass.: Provenance Press, Adams Media, Simon & Schuster

Never leave incense, candles, or anything else burning when you are not in the room to ensure you will be around for many more Imbolcs to come.

2015, Carl F. Neal, Imbolc: Rituals, Recipes & Lore for Brigid’s Day (Llewellyn’s Sabbat Essentials)‎, Woodbury, Minn.: Llewellyn Publishers

Brigid has also been described in relation to the different cycles as the Earth Mother. […] In another version of the Threshold Rites, a sheaf of wheat from the Samhain harvest was placed outside doors of homes on the eve of January 31. Some believed that the Goddess was present in the sheaf in her winter Cailleach form. Upon Imbolc, the sheaf becomes the infant Goddess Brigid once again, marking the fragile beginnings of the new agricultural cycle.

2015, Courtney Weber, “Imbolc: Brigid the Springtime Goddess, the Mother, and the Midwife”, in Brigid: History, Mystery, and Magick of the Celtic Goddess, San Francisco, Calif.: Weiser Books, Red Wheel/Weiser, page 149