code: public static Date getJavaDateOnly(final double excelDate, final boolean use1904windowing) {
          final Calendar javaCalendar = getJavaCalendar(excelDate, use1904windowing);
          if (javaCalendar == null) {
              return null;
          }
          return Utils.blastTime(javaCalendar).getTime();
      }
docs: Given an Excel date with either 1900 or 1904 date windowing, converts it
  to a java.util.Date.
  
  @param excelDate
  The Excel date.
  @param use1904windowing
  true if date uses 1904 windowing, or false if using 1900 date
  windowing.
  @return Java representation of the date without any time.
  
  @see java.util.TimeZone