Some may ask, “What is the significance of the release date of May 13 for Universae Ecclesiae?”
Connect the dots, dear people.
May 13, 1917 – Our Lady came to give dire warnings to the Church.
Msgr. Eugene Pacelli, the future Pope Pius XII:
“I am worried by the Blessed Virgin’s messages to Lucy of Fatima. This persistence of Mary about the dangers which menace the Church is a divine warning against the suicide of altering the Faith, in Her liturgy, Her theology and Her soul. … I hear all around me innovators who wish to dismantle the Sacred Chapel, destroy the universal flame of the Church, reject Her ornaments and make Her feel remorse for Her historical past.”
Draw your own conclusions, but I believe the date to be a significant signal grace from our Lady of Fatima. Our Lady of Fatima, pray for us!
Here is the document Universae Ecclesiae: