When Pope Francis announced that he was going to declare sainthood for Junipero Serra during a flight to Manila in January 2015, some people took it as an impromptu decision. And while the announcement might have been made on the spur of the moment, the process that led to it was anything but.
When the Catholic Church declares someone a saint (including Junipero Serra), a long, deliberate protocol must be followed. The aim is to reach a maximum certainty about the worthiness of the person canonized (declared a saint). But worthiness for what?