The week has a rhythm, and the organizers' outline for Seoul shows it. Tuesday opens with a Mass celebrated by the Archbishop of Seoul. On Wednesday, Thursday and Friday mornings bishops give catechesis, and from Tuesday to Friday the Youth Festival fills the city with concerts and exhibitions alongside the Vocations Fair and the Reconciliation Park, where priests hear confessions. The Papal Welcome is on Thursday afternoon, August 5, and the Way of the Cross on Friday. On Saturday everyone moves to the Vigil site, prays and adores the Eucharist, and sleeps there in sleeping bags; the Closing Mass is on Sunday morning, when the next host city is announced. The outline lists the Pope at those four main events, though the Holy See has not yet published a papal travel program, and the venues had not been announced as of October 2026.
What people who have been tend to describe is the scale and the effort: hundreds of thousands of young Catholics from every country, flags and singing in the streets, long confession lines, long walks, heat and little sleep. Seoul's organizers expect about 500,000 participants. One U.S. diocese tells its pilgrims to expect 6 to 10 miles (10 to 16 km) of walking a day and to carry their own gear to the Vigil.
It is aimed at ages of about 14 to 30, but all are welcome and there is no upper age limit. Most Americans go with a diocesan, parish or campus group, whose Group Leader registers everyone on the official site, wydseoul.org; registration is expected to open in late October 2026. Many groups first spend July 29 to August 2 with host communities in other Korean dioceses, the Days in the Dioceses. Attending the events is free; registered pilgrims choose a package for lodging, meals and transport.