when does the 490-year prophecy begin?
The 490-year prophecy begins from a particular time after the Babylonian captivity, as the context states. The captivity started in 606 B.C., lasted 70 years, and Ezra returned about 526 B.C. by Cyrus's decree to rebuild the temple. The transcript does not specify the exact starting point.
Les teaches that the 490-year prophecy is measured from a particular time that occurs after the Babylonian captivity. He recounts that Nebuchadnezzar took Daniel and the Jews captive to Babylon in 606 B.C., and the captivity lasted 70 years, bringing the timeline to about 526 B.C. At that time, Ezra returned by the decree of Cyrus to rebuild the temple that Nebuchadnezzar's forces had destroyed. Les emphasizes getting the time frame right, noting that Jeremiah had prophesied the 70-year captivity, but he does not explicitly identify the exact commencement of the 490 years in this segment.