DN2Date:

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   Computes the date from the day number and year. January 1 is day 1.
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   Form:
   dateTime = DN2Date( dN, year )
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   ------
   Inputs
   ------
   dN            (1,1) Day number
   year          (1,1) Year

   -------
   Outputs
   -------
   dateTime      (1,6) [year month day hour minute seconds]

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   References: Montenbruck, O., T.Pfleger, Astronomy on the Personal
               Computer, Springer-Verlag, Berlin, 1991, p. 12.
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Children:

Common: Time/Date2JD
Common: Time/JD2Date