The show is going to pick up where it left off in January 1967?
Last time I checked it was Summer of '66 on AD. Meg & Roxanne had their graduation, Patty is taking Summer School (by choice) and Beth was thinking of going back to college for Fall courses.
I think that someone got the timeline mixed up. If season 3 left off in Summer '66 it can't pick up in January '67.