Wordpress theme, get_lastpostmodified daylight savings

Question

Have a problem with wordpress theme showing correct, last overall modified date of either posts or pages.

When i update or post a new page or post, on home page it shows the last date and time of when the information was update on the website.

Currently using this to achieve that:

Last updated on: <?php

$tmp = substr(get_lastpostmodified('gmt'),0,-3);

$tmp .= "-2";

echo date('Y-m-d H:i', strtotime($tmp)); ?>

The output of that on the page is:

Last updated on: 2022-03-28 05:30

This does all that i need however... it has problems with daylight savings. What would be the correct way of doing this ? Now with daylight savings it should be showing: Last updated on: 2022-03-28 06:30

In wordpress general settings i can see that wordpress knows and accounts for daylight savings, but how do i get that time and date ?

Thanks

Update:
Found the solution myself. Dont know if its the right way to do it but if someones interested.

Last updated on: <?php 
            date_default_timezone_set('Europe/Paris');
            $tmp = get_lastpostmodified('gmt');
            $tmp .= "+0";
            echo date('Y-m-d H:i', strtotime($tmp)); ?>

Got timezone from: https://www.php.net/manual/en/timezones.php