quote:

The following PHP code, when inserted in an HTML page that has been given a filename ending in .php (not .html), will display the current date and time in New York City:

<?php
putenv('TZ=America/New_York');
echo date("Y-m-d h:i:sa", time());
?>

By default, the date function of PHP also outputs the date and time for the web server's time zone. But the putenv function changes this by setting the effective time zone to the city we want. Linux users can find a list of valid time zone names in the /usr/share/zoneinfo directory (there are subdirectories for continents and so forth). You can leave out the date by skipping the Y-m-d part, and you can leave out the time by skipping the h:i:sa part. For more information about these formatting characters and what else can be done with them, see the PHP manual page for the date function.