While St. Faustina was accustomed to praying the Rosary on a regular basis, she resolved to pray the Rosary in a special way on Saturdays.
Saturdays are traditionally days devoted to the Virgin Mary, as they recall the time Mary spent on Holy Saturday, mourning over the loss of her son, Jesus.
St. Faustina explains in her Diary that she received permission "on Saturdays, to say five decades of the Rosary with outstretched arms" (246).
This she listed as a "small mortification," in comparison to the suffering that Jesus suffered on the cross.
She would often turn to the Rosary and did so when confronted with demonic spirits. After she prayed the Rosary, the spirits went away.
The Rosary was an important part of St. Faustina's life, and her funeral was even on October 7, the Feast of Our Lady of the Rosary.
We can learn from her devotion to the Rosary and discern how we can incorporate it into our spiritual lives.