This Friday (Good Friday, April 22) is a day of sadness to the human kind. Then, why is it called Good Friday?
closed as general reference by coleopterist, Robusto, Kristina Lopez, RegDwighт♦ Mar 3 at 2:48
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The Wikipedia page on Good Friday reports the following:
So, good can be traced back to meaning holy, which then gives more sense to the expression.
The obsolete sense of "good" may explain the origin of the name "Good Friday". The fact that the name has endured reflects the view of many Christians that Jesus Christ's death brings great benefits, consistent with the teaching of Jesus himself as recorded in the Bible.