Box Set Songs

This might have been answered before, but I couldn't find an answer by searching, so:

Was there ever an officially confirmed list of dates when the songs from the box set were written?

I'd like to update my list.

Thanks in advance!

The mis-labelling of dates from the box set is one of my biggest pet peeves. There's so much speculation, I'd love to have specific, accurate info. Especially for Ordinary People.