Conversation so far:
When did Pedro begin his sainthood?
On December 19, 2011, the Holy See officially approved the miracle qualifying Calungsod for sainthood by the Roman Catholic Church.
Where did Pedro Calungsod begin sainthood?
In 1668, Calungsod, then around 14, was amongst the exemplary young catechists chosen to accompany Spanish Jesuit missionaries to the Islas de los Ladrones.
Did Pedro Calungsod get his Sainthood from Catholics in specific?
In Guam, Calungsod received basic education at a Jesuit boarding school, mastering the Catechism and learning to communicate in Spanish.
On what day of the week is Pedro Calungsod's sainthood shared?
Saturday has been designated as the day of devotion and novenas in his honour
Is Pedro Calungsod the first person who became a saint?
No
Were there any important dates involved in Pedro Calungsod's sainthood?
In their search for a runaway companion named Esteban, Calungsod and San Vitores came to the village of Tumon, Guam on April 2, 1672.

Question: What happened on this day involving sainthood?
Self-contained rewrite: What happened on April 2, 1672 day involving Pedro Calungsod's sainthood?