Although every day is "holy" - "set apart for the glory of God" - this is a very special "holy week" in the life of Christian people: the week we remember Christ's death on the cross of Calvary, and then celebrate His resurrection from the grave!  At Calvary He paid the price for our sins, and on Easter morning He proved His power over sin and death as God the Father raised Him from the grave!  To God be all glory and praise!