How long was the interval between Pentecost and the stoning of Stephen, and when was Stephen stoned?
The interval was seven years. Pentecost occurred in 29 A.D., and Stephen was stoned in 36 A.D., after Saul had reached the height of persecuting Jewish believers. Saul's conversion on the Damascus road followed the next year. This timeline shows time moving through Acts.
Les explains that Christ was crucified and Pentecost took place in 29 A.D. He feels there was a seven-year interval between Pentecost and the stoning of Stephen, which would place it in 36 A.D. At that time Saul was at the height of persecuting those Jewish believers and had brought about the stoning of Stephen. The next year Saul was converted on the road to Damascus, which then would take you up to 40 A.D. when he went to Cilicia. Les notes this timeline to show that all during the book of Acts, time is moving on; it was not all happening just in a year or so.