
While there are many longstanding Pagan holidays observed in the beginning of February, the Christian holiday of Candlemas grew out of a specific Roman Pagan observance. February was an important festival month on the Roman calendar and thus began with a purification ceremony known as Juno Februa, Juno the Purifier. The most prominent of the Roman matriarchal deities, Juno is essentially the goddess of essence itself. She is thought of as a moon goddess, since her worship originally revolved around the lunar cycle, but this only partially explains her. She is the state of Being, illustrated by the waxing white moon appearing out of the black void. The Romans saw not only plants, animals, and inanimate objects such as rocks or mountains as having spirit, but core truths or principles as well. Thus the month of vital ceremonies required not simply purification practices, but the calling up of the essence of purification herself. Some say Juno Februa occurred at the second full moon following the winter solstice before Rome adopted a solar calendar, but by the start of the common era the date of the festival was fixed at forty days past the (also static) December 25th date of the winter soltice festivities.
Under Christian rule, Juno Februa became a celebration of the purification of the Virgin Mary following the birth of Jesus. The mass was celebrated with a procession involving a great many candles like the earlier Roman holiday. Mary took on not only the ritual date and its association with purification, but Juno’s white lily. The lily became a symbol of Mary’s renewed purity. The goddess Juno, though like Mary also a mother, needed no such purification because the idea of pollution in childbirth was foreign to her cult. She came to bestow purification, not to partake of it, and would give birth a full month later to her own son, the god Mars. The birth of Mars was also a virgin birth: Juno conceived him through the fragrance of the white lily, the white lily being a form of Juno herself. In other words, Juno impregnated herself and her white lily symbolizes self generation.

Today among witches and many other Pagans February 2nd is a time for vows and initiations. There are many reasons for this having to do with Celtic and Germanic beliefs, but the Roman observation of Juno Februa also fits nicely with this understanding of the holy day. During this time of commitment intentions need to be unassailable, informed by the essence of purity Herself.
Sources
Durdin-Robertson, Lawrence. The Year of the Goddess: A Perpetual Calender of Festivals. Wellborough, UK: Aquarian Press, 1990.
Hazlitt, William Carew and John Brand. Faiths and folklore of the British Isles. New York: Charles Scribner’s Sons, 1905. http://books.google.com/books/about/Faiths_and_folklore_of_the_British_Isles.html?id=JDXYAAAAMAAJ
Monaghan, Patricia. The Book of Goddesses and Heroines. St. Paul, MN: Llewellyn, 1990.
Perowne, Stewart. Roman Mythology. London: Paul Hamlin, 1969.
Walsh, William Shepard. Curiosities of Popular Customs and of Rites, Ceremonies, Observances. 1898. Detroit: Gale Research Company. 1966 Reprint. http://books.google.com/books?id=VKwYAAAAIAAJ&dq=Candlemas+Pope+Innocent+XII&source=gbs_navlinks_s
Walker, Barbara G. The Woman’s Dictionary of Symbols and Sacred Objects. San Francisco: Harper and Row, 1988.