Yule, Yuletide, Hjol, Jol, is one of the eight pagan Sabbats. It is a great festival of gift giving and welcoming back the warmth of the sun and of course, figuratively and literally, letting go of all the darkness. Yule brings with its festivities a deep psychological change in every pagan, and the ritual usually allows safe space for letting go and climbing a step higher toward our true selves.
the Dark Moon has its core working in banishing, transformational or journey work, cuttings and introspective contemplation. The Full Moon and the Dark Moon are both excellent times for scrying in your black mirror, in the embers of the fire, or using whichever form of divination that you see fit.