anchor.diff:                        (let* ((full-name (subseq (princ-to-string file) cutoff-position))
                                (name (pathname-name file))
                                (timezone (%realize-timezone (make-timezone :path file :name name))))
  -                        (push (list full-name timezone) *timezone-repository*)
  -                        ;; TODO this entire *timezone-offset->timezone* is probably useless this way,
  -                        ;; we can't reverse map a +01:30 offset to a timezone struct, or can we?
  -                        (dolist (subzone (timezone-subzones timezone))
  -                          (pushnew timezone (gethash (first subzone) *timezone-offset->timezone*)))))))
  +                        (push (list full-name timezone) *timezone-repository*)))))
         (setf *timezone-repository* nil)
  -      (setf *timezone-offset->timezone* (make-hash-table))
         (cl-fad:walk-directory root-directory visitor :directories nil
                                :test (lambda (file)
                                        (not (find "Etc" (pathname-directory file) :test #'string=))))
  -      ;; walk the Etc dir last, so they will be the first entries in the *timezone-offset->timezone* map
         (cl-fad:walk-directory (merge-pathnames "Etc/" root-directory) visitor :directories nil)
         (setf *timezone-repository* (sort *timezone-repository* #'string< :key #'first)))))
   
  
positive.code:     result))
  
  (defun %realize-timezone (zone &optional reload)
    "If timezone has not already been loaded or RELOAD is non-NIL, loads the timezone information from its associated unix file."
    (when (or reload (not (timezone-loaded zone)))
      (with-open-file (inf (timezone-path zone)
                           :direction :input
  
negative.code:         (defparameter *default-timezone* +utc-zone+))))
  
  (defparameter *timezone-repository* nil "A list of (list \"Europe/Budapest\" timezone) entries")
  
  (defun timezone= (timezone-1 timezone-2)
    "Return two values indicating the relationship between timezone-1 and timezone-2. The first value is whether the two timezones are equal and the second value indicates whether it is sure or not.
  