public static LocalDateTime getLocalDateTime(double date, boolean use1904windowing) {
        return DateUtil.getLocalDateTime(date, use1904windowing, true);
    }
Given an Excel date with either 1900 or 1904 date windowing,
converts it to a java.time.LocalDateTime.

Excel Dates and Times are stored without any timezone
information. If you know (through other means) that your file
uses a different TimeZone to the system default, you can use
this version of the getJavaDate() method to handle it.

@param date             The Excel date.
@param use1904windowing true if date uses 1904 windowing,
                        or false if using 1900 date windowing.
@return Java representation of the date, or null if date is not a valid Excel date
fastexcel-core/src/main/java/cn/idev/excel/util/DateUtils.java