It may seem maudlin to reflect too deeply on such things but, without wishing to dwell gratuitously on the violence, it is surely healthy to keep a day and a half a year when we acknowledge the awful impact of Jesus' death. To turn immediately to the resurrection is like a denial of reality, but to contemplate the sense of God's absence that the disciples must have felt may have a spiritual value for us.
For those who have lived with a fragmented faith, a faith that has had too many holes punctured in it by circumstances, too much damage ever to return to a simplistic certainty, there is something healing about living through the rise and fall of the Church seasons. It's a relief to acknowledge the disappearance of God on Holy Saturday and the uncertainty of the outcome. That's not to say we have to remove ourselves from the hope of the resurrection, but we admit that hope doesn't prevent the bleakness of God's apparent absence descending even upon those with the strongest faith. C.S. Lewis wrote in A Grief Observed that when you are happy and feel no particular need of God, he seems to be there and welcoming you with open arms:
"But go to him when your need is desperate, when all other help is vain, and what do you find? A door slammed in your face, and a sound of bolting and double bolting on the inside. After that, silence."As their hope for a new future evaporated overnight, the disciples faced instead a chasm of grief as God vanished from sight with no promise that he would ever return...
...This is what Holy Saturday is: the absence of God, and the uncertainty and emptiness of dreams uprooted. Easter faith was born in the darkness, and, like the the disciples, sometimes we just have to wait in the shadows until eventually a glimmer of light appears on the horizon."
an excerpt from Giving it Up: Daily Bible Readings from Ash Wednesday to Easter Day