How to Fix the wrong input format of Customer date of birth

[selusi]

Preconditions

1. PHP 7.0.22
2. MySql 5.7
3. Apache 2.4
4. Magento 2.2.0

Steps to reproduce

1. Login to frontend
2. Edit Customer information

Expected result

1. The year of birth date should be in the format: yyyy.

Actual result

1. The actual format is yy

To fix the issue

To solve the issue have to modify the file:
vendor\magento\module-customer\Block\Widget\Dob.php
Actually the line 113 is:

$data['format'] = $this->getDateFormat(); 

(that return MM/dd/yy format in English locale)
This format is good for javascript datepicker configuration but it is wrong for the form input text.
I wrote a method that return the correct date format:

protected function getDateFormatForInput()
{
    $formatArr = explode(' ', preg_replace("/[^a-zA-Z]/",' ',$this->getDateFormat())) ;
    $reseteFormat = array();
    foreach($formatArr as $k){
        if($k != ''){
            if(substr($k,0,1) == 'y' ){
                $reseteFormat[] = 'yyyy';
            } else {
                $reseteFormat[] = $k;
            }
        }
    }
    return implode("/", $reseteFormat);
}

the new 113 line:

$data['format'] = $this->getDateFormatForInput(); 

Obviously this is my code though not very elegant, but it solves the problem.

[magento-engcom-team]

@selusi, thank you for your report.
We've created internal ticket(s) MAGETWO-81452 to track progress on the issue.

[manuelson]

Can i work in this issue? Thanks!

[magento-team]

Internal ticket to track issue progress: MAGETWO-81580

[okorshenko]

Hi @selusi the issue has been fixed in 2.2-develop branch and will be available in 2.2.2 soon