C-a tC-a C-ttime [string]
Uses the message line to display the time of day, the host name, and the
load averages over 1, 5, and 15 minutes (if this is available on your
system). For window specific information use info.
If a string is specified, it changes the format of the time report like it
is described in the String Escapes chapter. screen uses a
default of “%c:%s %M %d %H%? %l%?”.
None yet.