Your last concert was to see who and when?

August 4, 2013 - I saw the Americana tour with: Ryan Bingham, My Morning Jacket, Wilco, (Bob Weir joined both of the above groups as a surprise guest), and Bob Dylan.

And my next concert is Built To Spill in late August of this year.

BTW, it is customary to start off a thread with your answer to your own question.