Babylonians. (Ezek. 21:25-27) Jehovah's Witnesses believe that this took place 70 years before 537 B.C., the year in which they believe the Jews returned from captivity ; that is, it took place by early October of 607 B.C. (Jer. 29:10; Dan. 9:2) Counting 2,520 years from early October of 607 B.C.