Description:
------------
Situation:
I'm doing some datetiem calculations. I have a start date time and calculate following dates based on recurrence rules. This means I add date intervals to the start date time value until a specific date time or number of results. Depending on the rule the date can be hundreds oy years in the future.

Error:
From time to time I got an error when trying to get the number of days in month of the resulting date time. The value I got was "0" (which isn't documented, because it shouldn't be possible). When I dum the object, the internal date time value is set to the invalid date "2770-01-00 15:00:00.000000".

I can't say how it came to the result, because there were too many date intervals added to the start date time, but it's easy to reproduced by creating a date time instance directly with this wrong time value.

Reproduced in the following PHP Versions:
7.2.2, 7.4.2, 7.4.7, 8.0.0-dev



Test script:
---------------
<?php
$datetime = new \DateTimeImmutable(
    '2770-01-00 15:00:00.000000',
    new \DateTimeZone('UTC')
);
\var_dump($datetime->format('j') === '0');
\var_dump($datetime);


Expected result:
----------------
bool(false)
object(DateTimeImmutable)#3 (3) {
  ["date"]=>
  string(26) "2769-12-31 15:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(3) "UTC"
}

Actual result:
--------------
bool(true)
object(DateTimeImmutable)#3 (3) {
  ["date"]=>
  string(26) "2770-01-00 15:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(3) "UTC"
}