Using less generic exceptions for dates

Hi, When using json_encode or json_decode with the JSON_THROW_ON_ERROR flag, JsonException might be thrown. When using new DateTime('foo'), a generic Exception is thrown. Incidentally, I wonder why it's not an InvalidArgumentException (but that could be another debate). But my main point is that I think it would be useful to use a specific exception ``` class DateException extends Exception {} ``` - It allows a specific treatment when catching exceptions - It allows a specific analysis when using static analysis tools like Psalm or PHPStan. In a general way, I would say that PHP class/method should always use scoped Exception instead of generics ones. I know nothing about how php is implemented but I would say introducing DateException shouldn't be too hard and it's BC. What do you think ?