Norma I was kind of in a hurry this morning but I think I can answer to a few more of your questions
When did the Crash episode happen?
When was the baby found?
Tess die?
Okay, here is what is sure... the day the Evanses spy on Isabel using her powers is May 10th, we've got that from 4AAAB, when the Military come to their house and take the tape we can clearly see 'Isabel, O5/10/02' written on it.
Now using that and the rest of the Crash episode, I'd say:
The Crash happened May 8th since if you watch the epi. you can see that there are obviously two nights between the moment the crash happens and the moment Isabel is filmed (1rst night Michael is there when the crash happens, which would be the night of May 8th the second one is when he comes and presents the daughter of the pilot (uh, Connie?

) to Max and Liz and Max asks to talk to him, May 9th... and then May 10th they rescue him and Isabel is filmed... does that work for everyone so far?
Now this is just a guess, but I'd say that Tess probably woke up and killed everyone on the base the day after or a couple of days after that... from her talk with Max in 4AAAB she said that she woke up just in time to get Zan, but I don't see her being out of it for more days considering the Crash apparently happened on May 8th.
That's also the same day/night they try to make her escape and fail, the day they all vote at Isabel's... and the same day she decides to sacrifice herself, ... so that would date her death around May 11th or 12th.
Max
decides to give Zan to adoption one week later( see end of 4AAAB)... so apparently on May 18th or 19th... but when his parents take him away Max is not wearing the same clothes, so either he changed in the meantime

, or they messed up big time again here (which definitely could happen!) or it's supposed to be another day. Don't know how long it could have taken the Evanses to take care of everything regarding the adoption... but it seems to be falling into place, and they would have left around the 25th if you see large.
Now I couldn't but if anyone can see a date on the newspaper Liz is holding at the beginning of Graduation... if they did this right of course and the date makes sense, it could certainly help you some more
That's it I guess
