In the thirtieth year, in the fourth month, on the fifth day of the month, as I was among the exiles by the Chebar canal, the heavens were opened, and I saw visions of God.
We see that the Prophet was called to the office of a Teacher in the fifth year after Jehoiachin had voluntarily surrendered himself to the king of Babylon, (2 Kings 24:15); and had been dragged into exile, together with his mother: for it was, says he, “in the thirtieth year.” The greater part of the Commentators follow the Chaldee Paraphrast, and understand him to date...
Now it came to pass in the thirtieth year,.... Either from the last jubilee, as R. Joseph Kimchi (r), Jarchi, and Abendana; or from the time that the book of the law was found by Hilkiah the priest (s); so the Targum, which paraphrases the words thus, "and it was in the thirtieth year after Hilkiah the high priest found the book of the law...
Now it came to pass in the thirtieth year, in the fourth [month], in the fifth [day] of the month, as I [was] among the captives by the river of Chebar, [that] the heavens were opened, and I saw visions of God.