Variable: erc-timestamp-format-left
erc-timestamp-format-left is a customizable variable defined in
erc-stamp.el.gz.
Value
"\n[%a %b %e %Y]\n"
Documentation
If set to a string, messages will be timestamped.
This string is processed using format-time-string.
Good examples are "%T" and "%H:%M".
This timestamp is used for timestamps on the left side of the
screen when erc-insert-timestamp-function is set to
erc-insert-timestamp-left-and-right.
If nil, timestamping is turned off.
Source Code
;; Defined in /usr/src/emacs/lisp/erc/erc-stamp.el.gz
(defcustom erc-timestamp-format-left "\n[%a %b %e %Y]\n"
"If set to a string, messages will be timestamped.
This string is processed using `format-time-string'.
Good examples are \"%T\" and \"%H:%M\".
This timestamp is used for timestamps on the left side of the
screen when `erc-insert-timestamp-function' is set to
`erc-insert-timestamp-left-and-right'.
If nil, timestamping is turned off."
:type '(choice (const nil)
(string)))