Here is the information about Josephus that you were seeking. It is a matter of deduction but I see no room for error in it. I am writing a paper on the 70 "weeks" and was seeking out the same info on Josephus that you were.

http://www.pickle-publishing.com/papers/sabbatical-years.htm

"5. Herod's Conquest of Jerusalem" (pp.165-167)

According to Josephus, Herod besieged Jerusalem during the spring and summer of a sabbatical year (Antiq., bk. 14, ch. 16, sect. 2). As far as what year this took place in, Josephus has this to say:

This destruction befell the city of Jerusalem when Marcus Agrippa and Caninius Gallus were consuls of Rome on the hundred eighty and fifth olympiad, . . . . (Ibid., bk. 14, ch. 16, sect. 4)

The 185th Olympiad began in July 40 BC and ended in June 36 BC. Agrippa and Gallus were consuls in 37 BC. Thus Jerusalem was besieged by Herod in the spring and summer of 37 BC. Since 38/37 BC was a sabbatical year according to Zuckermann, Zuckermann's sabbatical dates must therefore be correct. [table] [more]

I would caution you to notice that the tables by Zuckermann and Wacholder presume that there were no Jubilee years. My studies lead me to believe that the last Jubilee celebrated was during Christ's ministry. After this the Jews adopted a 49 year "Jubilee" under Roman pressure.

Take care, Lon Martin