Is there a set Wiccan liturgy or liturgical calendar?
Most Wiccans observe eight holiday “sabbats” in the “wheel of the year.” The names of these vary from trad[ition] to trad, but they fall on the solstices, the equinoxes, and the four “cross-quarter days” (on or about the first of February, May, August and November). Many Wiccans also observe “esbats,” rituals for worship in accordance with a given moon phase (such as the night of the full moon).