This family calls today "Holy Saturday." Another name for it is Easter Eve, but not Easter Saturday.
It's the day when we remember and celebrate the time that Jesus spent being dead. Then, in the evening, after nightfall, we celebrate His resurrection. All in all, a pretty big day.
The Catechism of the Catholic Church (631-637) goes into more detail about what this day means.
Tomorrow is Easter Sunday, a huge celebration.
Meanwhile, since it's well after nightfall now, I can say, "Christ is Risen!"