In a multinational context, what considerations should be taken into account when determining the timing of content display based on server time versus client time?

When determining the timing of content display based on server time versus client time in a multinational context, it is important to consider factors such as the location of the server, the time zone settings of the client's device, and any potential discrepancies in time between the server and client locations. One approach to address this issue is to use JavaScript to detect the client's time zone and adjust the displayed content accordingly.

<?php
// Get the client's time zone offset in minutes
$client_timezone_offset = $_COOKIE['client_timezone_offset'];

// Get the current server time
$server_time = new DateTime('now', new DateTimeZone('UTC'));

// Adjust the server time based on the client's time zone offset
$server_time->modify("+$client_timezone_offset minutes");

// Display content based on the adjusted server time
if($server_time->format('H') >= 12){
    echo "Good afternoon!";
} else {
    echo "Good morning!";
}
?>