Library: "Dates and Times"

Hello Guys,

i wanne display the time in an other timezone. So tried this:

PHP Code:

        $time =  Time::createFromTimestamp(1548131795, 'America/Chicago', 'en_US');
        $time2 = Time::createFromTimestamp(1548131795,'Europe/Berlin','de_DE');
        
        echo $time2->getTimeStamp().'<br />';
        echo $time->getTimeStamp().'<br />';
        echo  $time2->toLocalizedString($this->currentUser['TimeFormat']).'<br />';
        echo  $time->toLocalizedString($this->currentUser['TimeFormat']); 


 
So what i get is this:
_____________________
1548128195
1548153395
22.36.2019 04:36:35
22.36.2019 04:36:35
____________________

I expected to get different times. Because when i wanne make a call with someone in an other timezone... he need his "time" in his format and i need it in mine. Do I use the library wrong ?

Thanks, guys