In 10x09, Cas tells Claire that the human souls of vessels don't survive extreme damage, and that Jimmy died when Cas was "ripped apart at the subatomic level by an archangel." In the THEN segment, they showed when that happened in 5x22, BUT, if you remember, it actually FIRST happened in 4x22.
So, Jimmy Novak died on May 14th, 2009. Exactly 11 days after we met him... and we have definitive proof that the last thing Jimmy Novak did with his free will was save Claire's life.
I mean, we already knew that's what he did, but this just drives the point home.
Also, for those wondering, there is no year given for Dean's CBGB story, except for the fact that Dean was "way underage" - I was wondering where to place it, and thinking "way underage" had to be 16 or younger... but then I realized that drinking-age is super old in the states, so I have no idea what qualifies as "way underage" there. In the end, I just placed it in the timeline next to the equally nebulous "Sam runs away to Flagstaff" story.
Anyway, all these facts will get updated to the timeline once the season ends - provided that I have caught up by then.