>>149736298
Perhaps not but you can sure try.
>>149736589
I think the biggest thing that shows the change is how the characters are posed. And the changes to the character design, on top of how they act. The currant comics might take place a full year away in universe, but if you told me based upon how they act, look, and dress that it was when they where all in middle school I would believe it.

Compare Diane's first appearance to her third
>>149604236
>>149663201
In between about a 2 week Diane's put on about 30-40 pounds. So did all the girls really. On top of losing a bunch of confidence it their body langue.