How long was the period from the crucifixion to the destruction of the temple and the dispersion of Israel?

Les explains that the temple was not removed from Israel's religious scene until 69 or 70 A.D. He dates the crucifixion at 29 A.D., noting some say 33 but he considers 29 more accurate. That yields a 40-year period from the crucifixion until the temple was destroyed and Israel was dispersed. Les points out that the book of Acts covers that whole 40 years, during which Peter and John were still going to the temple at the hour of prayer, showing Israel was still under the law and had no concept yet of the grace of God.