<?php 
printf("%s<br>", date("l, F dS, Y: g:i A T"));
?>
That crashes PHP.

<?php 
printf("%s<br>", date("l, F dS, Y g:i A T"));
?>
That doesn't crash PHP.  Notice that there is no colon after the "Y" in this one.

PHP will also crash in this case:
<?php 
printf("%s<br>", date("l, F dS, Y"));
printf("%s<br>", date("g:i A T"));
?>

I'm using the CGI executable version of PHP Win32 (downloaded as a binary from www.php.net) on 
Apache version 1.3 Win32.