Description:
------------
---
From manual page: http://www.php.net/intldateformatter.formatobject
---
IntlDateFormatter::formatObject on a DateTime object is generating an incorrect output. For 1987-12-29, it is giving the output year as 1988.

I was able to replicate the issue on multiple PHP versions

7.0.32, 7.1.22 and 7.2.7  

For demo , run the test script at http://www.writephponline.com/

Test script:
---------------
<?php

echo PHP_VERSION . PHP_EOL . PHP_EOL;
$date = new DateTime('1987-12-29 19:14:00', new DateTimezone('Asia/Kolkata'));
print_r($date);
echo PHP_EOL . PHP_EOL;

$formatted = IntlDateFormatter::formatObject($date, 'MMMM d, YYYY', 'en');
echo $formatted;

Expected result:
----------------
7.1.22

DateTime Object
(
    [date] => 1987-12-29 19:14:00.000000
    [timezone_type] => 3
    [timezone] => Asia/Kolkata
)


December 29, 1987

Actual result:
--------------
7.1.22

DateTime Object
(
    [date] => 1987-12-29 19:14:00.000000
    [timezone_type] => 3
    [timezone] => Asia/Kolkata
)


December 29, 1988