code: function (year, month, dayOfMonth) {
              var prevYear = year - 1;    // 考虑公元前
              // 考虑公元前
              return DAYS_OF_YEAR * prevYear + floor(prevYear / 4) - floor(prevYear / 100) + floor(prevYear / 400) + getDayOfYear(year, month, dayOfMonth);
          }
docs: month: 0 based