Help with showing paid subscription Start/End date

[Pakerstan]

Excuse my noobness upfront, as I am new, but on a steep learning curve
I am not sure if this is something that can be set via ACP, or if this is a custom script, but I wanted to start here with the hunt for the information.
I have looked through everything I can find on relative information to what I want to show, and sadly did not find it. What I am trying to achieve is for the members paid subscriptions start and end date to show in the postbit area.


An example of what I mean can be seen below
http://imgur.com/3VvJ9sI

Is this something that is done by adding custom code to postbit, or a settings that I have not yet found