The term 'Midnight Meeting of Witches' is a reference to the Sabbat, a gathering of witches that occurs at midnight. The Sabbat is a ritualistic gathering of witches and other practitioners of magic, usually held outdoors at night. It is believed to be a time for witches to come together and celebrate their beliefs and practice their craft. During the Sabbat, witches may perform rituals, cast spells, and share stories.