<now> not an org time string?

[Samuel Wales]

seems this used to work but does not now.  what's a good replacement?

(defun alpha-org-daynum-from-ts (ts)
  ;; internal time
  ;; (org-time-string-to-time "[2000-01-01]")
  ;; (org-time-string-to-time "<2000-01-01>")
  ;; (org-time-string-to-time "<now>")
  (time-to-days (org-time-string-to-time ts)))
(defun alpha-org-daynum-from-now ()
  (alpha-org-daynum-from-ts "<now>"))


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