The text (if any) in the trades does have the right date, but in the overview all dates are 01/19/70.
(I noticed this first a few days ago, but have been mostly out this weekend.)
Just now a trade was answered (and accepted, yay), and on top of the answering message I saw this:
Message sent on Invalid Date at Invalid Date
'If we ever travel thousands of light years
to a planet inhabited by intelligent life,
let's just make patterns in their crops