Jesus was crucified in about 30 A.D. on a day that we call "Good Friday".
Jesus was resurrected two days later on a day that we call "Easter".
When Jesus died that night on the cross the sky went black and the curtain in the temple ripped.
There was/is serious controversy on the subject of the resurrection:
Some say that the Disciples stole the body and some say he resurrected. As Christians we know that Jesus did in fact resurrect.
Jesus talks to his Disciples and finally ascends into Heaven, ending His ministry on Earth.
Jesus' crucifixion, along with his birth are two of the most important events in Christian history. It is important for everyone to know how Christ sacrificed himself for us and how it historically lines up with a traditional roman punishment gives it historical credibility.