I seem to remember earlier (many decades earlier) articles insinuating that the Jews could have / should have figured out the exact date for Messiah to arrive based on the 70 weeks.
You remember this because it was drilled into us in one particular public talk, which I have the outline for because I gave it many, many times.
"Paying Attention to the Prophetic Word"
Here's the relevant part:
WHY WE SHOULD BE KEENLY INTERESTED IN BIBLE'S PREDICTIONS (10 min.)
Prophecies help us to see where we are in God's timetable
Examples (Mt 24:1-51; 2Ti 3:1-5)
Daniel 9:24-27 helped Jews know Messiah's appearance was close
Fulfilled prophecies strengthen faith in Bible as God's inspired Word
Fulfilled prophecies testify to Jehovah's omnipotence, his omniscience; not only foresees but also has control of future
(Isa 46:8-10)
Fulfilled prophecies strengthen our faith in those yet to be fulfilled
Prophecies written for our comfort, hope (Ro 15:4)