There are no readings because there is no mass today until evening when we have the Easter Vigil. On Good Friday we have services, but not mass. That means from the time we conclude the Holy Thursday Mass until the Eater Vigil there is about 48 hours where mass is not celebrated. That means for one day out of the calendar year there is no celebration of the mass. We are all asked to pray and fast during this time.
What happens on Holy Saturday when Jesus is in the tomb? I like best the way the Magnificat explains it. Here is an excerpt.
“Holy Saturday is a day of profound mystery: Christ is dead and yet he remains busy at work, descending to the underworld to free the righteous held captive in the chains of death. The mournful suspense of Holy Saturday is thus imbued with the certainty of the Resurrection. Though our earthly sojourn be continually tinged by death we know that our longing to exult in the fulness of redemption is not in vain. The Son of God himself has passed through death to rob it of its apparent finality. In Jesus, life wins!”
Fasting and prayer. When we think of what Jesus did for us, fasting and prayer is the least we could do. If not today, find some time to spend with the Lord.
May the Lord bless you in the name of the Father, and of the Son, and of the Holy Spirit. Amen