Definition of "Imbolg"

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