What Hour was Christ Crucified on?

Two well known Christians have recently left Christianity, in part citing as a reason contradictions in the Bible. If Christianity is a farce, or is true, it is better to find out now rather than later.
One of the most notable and difficult seeming discrepancies in the New Testament is that Mk. 15:25 says that Christ was crucified at the third hour. Jn. 19:14 says that Jesus’ trial was not yet over at the sixth hour.
Is this a contradiction or can it be harmonized?  Find out: