Tap the item - it will show the exact timestamp.
Get SMSBackup+ from the play store. This has am option that allows you to both log calls to a label in your Gmail account and/or create an event in a Google Calendar on your account. That way you can look at your Gmail account or Google Calendar to see when calls happened.
But, otherwise, no. Maybe with a replacement dialer? (I'm fine with the stock dialer and log but I know that Thom, for example, uses a third party dialer app, and maybe his app can do, or does, this.)
