[O] mark as done on a previous date?

[Stig Brautaset]

I'm trying to use org-habit to track my habits and sometimes I don't
get around to mark stuff as done on the day I do them. I've found two
different functions for marking stuff as done in the past, but I can't
get either of them to work.

Here are the two different approaches I found. The first was at
https://www.emacswiki.org/emacs/OrgMode#toc22 and is the most general:

#+BEGIN_SRC emacs-lisp
  (defun org-todo-at-date (date)
    (interactive (list (org-time-string-to-time (org-read-date))))
    (cl-flet ((org-current-effective-time (&rest r) date)
              (org-today (&rest r) (time-to-days date)))
      (org-todo)))
#+END_SRC

The second is from
https://joelmccracken.github.io/entries/emacs-hack-set-todo-done-yesterday/
and looks like this:

#+BEGIN_SRC emacs-lisp
  (defun org-todo-toggle-yesterday ()
    (interactive)
    (let ((time-in-question (decode-time))) 
      (decf (nth 3 time-in-question))
      (setq time-in-question (apply 'encode-time time-in-question))
      (flet ((current-time () time-in-question))
        (org-todo))))
#+END_SRC

Unfortunately, I haven't been able to get either to work. I've tested
with Org 9, and with =emacs -Q= (which gives me Org 8.2) but can't get
it to work in either. Perhaps the tricks employed do not work in Emacs
25?

FWIW:

: GNU Emacs 25.1.1 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 10.9.5 
(Build 13F1911)) of 2016-09-21
: Org mode version 9.0.3 (9.0.3-elpaplus @ 
/Users/stig/.emacs.d/elpa/org-plus-contrib-20161224/)

Stig