I think that just showing the date isn't enough. Hours and minutes would be useful.
Usefull in what for example? I think this wont be a matter, since there is a reference link for the trust to check when is the incident happened, although this wont show exactly
when is the rating left but what matter the most is actually the trust score and reference, not the date where some user left him
And also trust is basically a "guidance" for user to trade with more safety procedure when dealing with someone with red trust