World Youth Day

World Youth Day (WYD) is an event for the youth organized by the Catholic Church that was initiated by Pope John Paul II in 1985. The event is celebrated at the diocesan level annually and at the international level every two to four years, with the largest gathering being 6 million people in the Philippines in 2015. The event is characterized by a sense of unity and cultural exchange among the participants, who display their national flags and engage in chants and singing of national songs with a Catholic theme. The event also features the Pope's public appearance, including his arrival in the "Popemobile" and his final Mass held at the event.learn more on wikipedia