<?php

use Faker\Provider\Base;
use Faker\Factory;

class IntlDateProvider extends Base
{
    private $formatter;
    
    public function __construct($generator, $locale)
    {
        parent::__construct($generator);
        $this->formatter = new IntlDateFormatter(
            (string) $locale,
            IntlDateFormatter::MEDIUM,
            IntlDateFormatter::MEDIUM
        );
    }
    
    public function intldate()
    {
        $date = $this->generator->dateTime;
        
        return $this->formatter->format($date);
    }
}

$faker = Factory::create();
$faker->addProvider(new IntlDateProvider($faker, 'de'));

dump(
    $faker->intldate,
    $faker->intldate,
    $faker->intldate
);

^ "13.01.1994, 23:06:04"

^ "15.12.1975, 01:13:20"

^ "31.12.2014, 20:08:55"

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PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8