The Bladder Festival or Bladder Feast (Nakaciuq "something done with bladders" or Nakaciuryaraq "the process of doing something with bladders" in Yup'ik), is an important annual seal hunting harvest renewal ceremony and celebration held each year to honor and appease the souls of seals taken in the hunt during the past season which occurred at the winter solstice by the Yup'ik of western and southwestern Alaska.