Can we see when an answer has been accepted in the timeline of that answer? (I've tried it, but to no avail.)
If not, where can I see this?
To supplement Eric Wofsey's answer:
Answers accepted less than three days ago are shown as
The question owner accepted this as the best answer [X hours ago]/[yesterday]/[2 days ago].
rather than the exact time
The question owner accepted this as the best answer [month] [day] at [hour]:[minute].
In this case, one can go through the Reputation tab of the answerer's account to obtain the exact time of acceptance.