<html>
<pre>
<?php
echo "jan 1/1/2000 localtime: ". mktime (0,0,0,1,1,2000) . "\n";
putenv("TZ=GMT");
echo "jan 1/1/2000 GMT: ". mktime (0,0,0,1,1,2000) . "\n";
putenv("TZ=MST");
echo "jan 1/1/2000 MST: ". mktime (0,0,0,1,1,2000) . "\n";
putenv("TZ=US/Pacific");
echo "jan 1/1/2000 pacific: ". mktime (0,0,0,1,1,2000) . "\n";
?>
</pre>
</html>