Children plant trees on the feast of St. Francis in October 2019 in Indianapolis. Laudato Si' Week 2021 is May 16-25. (CNS/Courtesy of Indianapolis Archdiocese's Creation Care Commission) The Vatican's celebratory year for Pope Francis' encyclical on ecology is coming to a close, but organizers hope its end will mark the beginning of a major movement within the global Catholic Church to turn its message about preserving creation into actions to create a more sustainable world for all. In May 2020, the Dicastery for Promoting Integral Human Development declared a Special Laudato Si' Anniversary Year to mark the fifth anniversary of Francis' 2015 encyclical "