The main website is http://www.worldmeeting2018.ie
The website provides all the information you need for the week including the events taking place throughout the week, business seminars, and how to get tickets for the different events.
Tickets for the Papal Mass which are FREE need to be booked beforehand, and WMOF2018 will be adminstering this.
Volunteers are needed throughout the week (you must be resident in Ireland in order to complete a security check) and accommodation is needed for the many pilgrims that will attend and who are from low income countries. If you can offer a place for a pilgrim without cost, you need to register.
Full details are on the website www.worldmeeting2018.ie