Ok here it is so bear with me. Candlemas or "Imbolc", (which means in the belly, because this is the time of the year when the flocks begin to give birth.) Another name is Oilmec "ewe's milk." Candlemass, The Feast of Waxing Light, The Feast of Flames, Laal Breeshey, Brigid, Brigantia, and La Feill Bhride. We see the the change of the year here from the darker days of Winter to the lengthening days of Spring. It is the first harbinger of spring, the assusance that the Wheel is turning and the long warm days of summer will return.
It is particulary sacred to women and to Brigid, the Goddess of healing, inspiration, ans smithcraft. It is on Feb 2. every year. Most Christian religions do not celebrate it, it is a pagan holiday. Any Christian religions that do celebrate it (Feast of Saint Lucia, in Italy, and some nordic countries) have adapted it for the purpose to convert the pagans in the ancient times. So the answer would be Yes it is a real holiday, but only to those who are of the Pagan paths.