Need "last modified on <date>" on every page 

It would be nice to have a "last modified on <date>" on the bottom info space to the left hand side of the page which shows when the page content was last modified. Right now it just shows "Last modified x minutes ago" that too I guess, only for site admins.

I would say priority of this is 5/5 (1 being highest and 5 being lowest), so attend to this at your leisure :-)
