anchor.diff:  (defpackage :local-time
       (:use #:cl)
     (:export #:timestamp
  +           #:date
  +           #:time
              #:make-timestamp
              #:day-of
              #:sec-of
  
positive.code: 
  (deftype timezone-offset ()
    '(integer -43199 50400))
  
  (define-condition invalid-timezone-file (error)
    ((path :accessor path-of :initarg :path))
  
negative.code:            #:+rfc-1123-format+
             #:astronomical-julian-date
             #:modified-julian-date
             #:astronomical-modified-julian-date)
    (:shadow #:time))
  
  (in-package :local-time)
  
  