Why is the First Saturdays devotion called the ‘unfulfilled part of the Fatima message’?

Crowds looking at the Miracle of the Sun, occurring during the Our Lady of Fatima apparitions. / Public Domain.

Boston, Mass., Mar 30, 2022 / 15:07 pm (CNA).
When the Blessed Virgin Mary appeared to three shepherd children at Fatima, she asked … […]