MGH_DT_ZONE Name
  
   MGH_DT_ZONE Purpose
  
   This function returns the local machine's time zone.
Category
      Date-time.
Calling Sequence
      Result = MGH_DT_ZONE()
Return Value
  
   The function returns a scalar double-precision value representing
      the difference between local time and UTC in hours
Procedure
  
   Compare results of systime(/JULIAN) and systime(/JULIAN, /UTC) 
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     be put or the results to be obtained from the use of the
    
     software.  Accordingly NIWA accepts no liability for any loss
    
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          through the use of or reliance on the software.
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     software where the software is used or presented in any form. 
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Modification History
  
   Mark Hadfield, 2001-05: 
          Written.