Gathering Day is a Welsh festival of the summer solstice, so called because it was the time when druids gathered mistletoe and other plants for use in winter. The energy of plants harvested at Midsummer was believed to be very potent, hence herbs were collected then for medicinal use; these herbs included mugwort and vervain.This festival marks the first of the three harvests of the year and the time for collecting young tender vegetables such as peas, beans and early fruits.