Hope AL is back from being sick. Either way I'm gonna guess it's an '00s day.
ETA: there is some scuttlebutt that we may be getting 1968 (!). Apparently that was the "flashback" year on the 8:15 Pop Quiz.
ETA2: it's '68 but AL is "on vacay" (again?) so it'll be an "encore" (Somehow all this seems appropriate, as today is "Opposite Day")