Variable: display-time-string
display-time-string is a variable defined in time.el.gz.
Value
nil
Documentation
String used in mode lines to display a time string.
It should not be set directly, but is instead updated by the
display-time function.
Source Code
;; Defined in /usr/src/emacs/lisp/time.el.gz
(defvar display-time-string nil
"String used in mode lines to display a time string.
It should not be set directly, but is instead updated by the
`display-time' function.")