Variable: org-log-done-with-time
org-log-done-with-time is a customizable variable defined in
org.el.gz.
Value
t
Documentation
Non-nil means the CLOSED time stamp will contain date and time.
When nil, only the date will be recorded.
Source Code
;; Defined in /usr/src/emacs/lisp/org/org.el.gz
(defcustom org-log-done-with-time t
"Non-nil means the CLOSED time stamp will contain date and time.
When nil, only the date will be recorded."
:group 'org-progress
:type 'boolean)