*/
    public static Calendar toCalendar(final Object o, final String pattern) {
        if (o instanceof Calendar) {
            return (Calendar) o;
        }
        final java.util.Date date = DateConversionUtil.toDate(o, pattern);
        if (date != null) {
            final Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            return cal;
        }
        return null;
    }

    /**