Copy the following code into your ~/.screenrc Or if you want to add the statusbar globally, add it to /etc/screenrc.
# An alternative hardstatus to display a bar at the bottom listing the # windownames and highlighting the current windowname in blue. (This is only # enabled if there is no hardstatus setting for your terminal) hardstatus on hardstatus alwayslastline hardstatus string "%{.bW}%-w%{.rW}%n %t%{-}%+w %=%{..G} %H %{..Y} %m/%d%C%a "
When running screen, the result should look similar to this:
