A copule of postings ago I mentioned that Simon & Garfunkel played in the Dillon Gym at Princeton University. After contacting PU staff I got an email confirming the Simon & Garfunkel performance on:
1967-05-05 Princeton, NJ – Princeton University, Dillon Gym
So another (confirmed) date added to the 1967 list.
Also, as you all know, Simon & Garfunkel played at the 1967 Monterey International Popfestival. Here’s an early May 1967 advertisement for that festival:
Paul Simon - 'Time it was...it was' 