"The faithful should unite with the Church in this her intention, and offer to God their fasting and abstinence for the purpose of obtaining worthy ministers of the word and of the Sacraments, and true pastors of the people." -- http://catholicismhastheanswer.com/quatuor-tempora-the-ember-days/
"Ember Days are days favored for priestly ordinations, prayer for priests, first Communions, almsgiving and other penitential and charitable acts, and prayer for the souls in Purgatory. Note that medieval lore says that during Embertides, the souls in Purgatory are allowed to appear visibly to those on earth who pray for them.
Because of the days' focus on nature, they are also traditional times for women to pray for children and safe deliveries. " -- https://www.fisheaters.com/emberdays.html