Had to look up Mabon. Never heard the term before, or did I just forget I knew it? Seems strange I'm only hearing it now for the first time. AI said:
AI Overview
Mabon is the Pagan and Wiccan celebration of the Autumn Equinox, a mid-harvest festival of thanks, balance, and preparation for winter. While the name was adopted in the 1970s from the Welsh mythology of Mabon ap Modron, it serves as a significant time to give thanks for the year's harvest, reflect on the balance between day and night, and express gratitude for abundance while preparing for the darker half of the year.