World Youth Day (WYD) is a gathering of young people from all over the world with the Pope. It is at the same time a pilgrimage, a celebration of youth, an expression of the universal Church and a powerful moment of evangelization for the world of youth. It is an invitation to a generation determined to build a more just and united world. With a clearly Catholic identity, it is open to all, whether they are close to the Church or far from it. It is held every year at the diocesan level, on the Sunday of Christ the King, and every two, three or four years as an international meeting, in a city chosen by the Pope, always in his presence. It brings together thousands of young people to celebrate faith and belonging to the Church. Since the first edition, held in Rome in 1986, World Youth Day has proven to be a laboratory of faith, a place of birth of vocations to marriage and consecrated life, as well as an instrument of evangelization and transformation of the Church.