How do I determine the time on a log file entry that won't render

I have a Networker 9 storage node that keeps reporting "errno = An existing connection was forcibly closed by the remote host" in the daemon.raw.

However, after rendering the log, at the beginning of the line it says that it is "Unable to render the following message" so I can't determine the date and time of the error.  I see that the date/time is stored in some kind of serial number(1468928259) format in the RAW file.

Is there a way to convert that number to a date/time so I can try to figure out what is killing the connection?