In the Eastern Orthodox Church, the Apostolic Fast, also known as the Fast of Peter and Paul, begins one week after Pentecost and continues until the Feast of Saints Peter and Paul on June 29. This fast is a period of abstinence from certain foods and other forms of indulgence, intended as a time of prayer, penance, and spiritual renewal. Wikipedia explains that the duration of the fast varies, influenced by the moveable date of Pascha (Easter), but typically ranges from eight to forty-two days.