src/main/java/com/microsoft/sqlserver/jdbc/IOBuffer.java [6149:6188]:
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        if (SSType.DATE == ssType || SSType.DATETIME2 == ssType || SSType.DATETIMEOFFSET == ssType) {
            // Computation of the number of days into the Common Era assumes that
            // the DAY_OF_YEAR field reflects a pure Gregorian calendar - one that
            // uses Gregorian leap year rules across the entire range of dates.
            //
            // For the DAY_OF_YEAR field to accurately reflect pure Gregorian behavior,
            // we need to use a pure Gregorian calendar for dates that are Julian dates
            // under a standard Gregorian calendar and for (Gregorian) dates later than
            // the cutover date in the cutover year.
            if (cal.getTimeInMillis() < GregorianChange.STANDARD_CHANGE_DATE.getTime()
                    || cal.getActualMaximum(Calendar.DAY_OF_YEAR) < TDS.DAYS_PER_YEAR) {
                int year = cal.get(Calendar.YEAR);
                int month = cal.get(Calendar.MONTH);
                int date = cal.get(Calendar.DATE);

                // Set the cutover as early as possible (pure Gregorian behavior)
                cal.setGregorianChange(GregorianChange.PURE_CHANGE_DATE);

                // Initialize the date field by field (preserving the "wall calendar" value)
                cal.set(year, month, date);
            }

            int daysIntoCE = DDC.daysSinceBaseDate(cal.get(Calendar.YEAR), cal.get(Calendar.DAY_OF_YEAR), 1);

            // Last-ditch verification that the value is in the valid range for the
            // DATE/DATETIME2/DATETIMEOFFSET TDS data type (1/1/0001 to 12/31/9999).
            // If it's not, then throw an exception now so that statement execution
            // is safely canceled. Attempting to put an invalid value on the wire
            // would result in a TDS exception, which would close the connection.
            if (daysIntoCE < 0 || daysIntoCE >= DDC.daysSinceBaseDate(10000, 1, 1)) {
                MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_valueOutOfRange"));
                Object[] msgArgs = {ssType};
                throw new SQLServerException(form.format(msgArgs), SQLState.DATA_EXCEPTION_DATETIME_FIELD_OVERFLOW,
                        DriverError.NOT_SET, null);
            }

            byte encodedBytes[] = new byte[3];
            encodedBytes[0] = (byte) ((daysIntoCE >> 0) & 0xFF);
            encodedBytes[1] = (byte) ((daysIntoCE >> 8) & 0xFF);
            encodedBytes[2] = (byte) ((daysIntoCE >> 16) & 0xFF);
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src/main/java/com/microsoft/sqlserver/jdbc/IOBuffer.java [6309:6348]:
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        if (SSType.DATE == ssType || SSType.DATETIME2 == ssType || SSType.DATETIMEOFFSET == ssType) {
            // Computation of the number of days into the Common Era assumes that
            // the DAY_OF_YEAR field reflects a pure Gregorian calendar - one that
            // uses Gregorian leap year rules across the entire range of dates.
            //
            // For the DAY_OF_YEAR field to accurately reflect pure Gregorian behavior,
            // we need to use a pure Gregorian calendar for dates that are Julian dates
            // under a standard Gregorian calendar and for (Gregorian) dates later than
            // the cutover date in the cutover year.
            if (cal.getTimeInMillis() < GregorianChange.STANDARD_CHANGE_DATE.getTime()
                    || cal.getActualMaximum(Calendar.DAY_OF_YEAR) < TDS.DAYS_PER_YEAR) {
                int year = cal.get(Calendar.YEAR);
                int month = cal.get(Calendar.MONTH);
                int date = cal.get(Calendar.DATE);

                // Set the cutover as early as possible (pure Gregorian behavior)
                cal.setGregorianChange(GregorianChange.PURE_CHANGE_DATE);

                // Initialize the date field by field (preserving the "wall calendar" value)
                cal.set(year, month, date);
            }

            int daysIntoCE = DDC.daysSinceBaseDate(cal.get(Calendar.YEAR), cal.get(Calendar.DAY_OF_YEAR), 1);

            // Last-ditch verification that the value is in the valid range for the
            // DATE/DATETIME2/DATETIMEOFFSET TDS data type (1/1/0001 to 12/31/9999).
            // If it's not, then throw an exception now so that statement execution
            // is safely canceled. Attempting to put an invalid value on the wire
            // would result in a TDS exception, which would close the connection.
            if (daysIntoCE < 0 || daysIntoCE >= DDC.daysSinceBaseDate(10000, 1, 1)) {
                MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_valueOutOfRange"));
                Object[] msgArgs = {ssType};
                throw new SQLServerException(form.format(msgArgs), SQLState.DATA_EXCEPTION_DATETIME_FIELD_OVERFLOW,
                        DriverError.NOT_SET, null);
            }

            byte encodedBytes[] = new byte[3];
            encodedBytes[0] = (byte) ((daysIntoCE >> 0) & 0xFF);
            encodedBytes[1] = (byte) ((daysIntoCE >> 8) & 0xFF);
            encodedBytes[2] = (byte) ((daysIntoCE >> 16) & 0xFF);
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