Medjugorje International Youth Festival
Medjugorje International Youth Festival, also known as Mladifest (lit. "Youthfest"), is an annual festival of Catholic youth organized in Medjugorje, Bosnia and Herzegovina, between 1 and 6 August, to mark the birthday of Virgin Mary, mother of Jesus on 5 August, as claimed by the alleged seers of the presumed local Marian apparitions.
Source: Wikipedia — Medjugorje International Youth Festival (CC BY-SA 4.0)