In June 1961, The Virgin Mary appeared to four young girls near the village of Garabandal in northwest Spain; she continued to visit them over four years. The apparition gave the girls numerous general lectures urging repentance, and foretold them of a miraculous sign that will appear some day. It is known that the event will occur between March-May 8-16 on a Thursday at 8:30 p.m. It will appear within a year of the Warning foretold by Our Lady of Fatima. The seer Conchita will know of the event 8 days in advance. It will happen on the feast day of a Eucharist martyr, and will coincide with a "great event" of the Catholic Church. The local bishop also will learn of the impending sign, and will allow priests to go to Garabandal. Conchita said this about the event:

It will be visible to all those who are in the village and surrounding mountains; that the sick who are present will" be cured and the incredulous will believe. It will be the greatest miracle that Jesus will have performed for the world. There won't be the slightest doubt that it comes from God and that it is for the good of mankind. A sign of the Miracle, which it will be possible to film or televise, will remain forever."