<?php $timeg = date( 'g:ia', current_time( 'timestamp', 0 ));
$timem = '12:54pm';
if ($timem == $timeg)
{

$to = '[email protected]';
$subject = 'Post Published by Author';
$headers = 'From: admin <[email protected]>' . "rn";
$message = 'your';

   wp_mail($to, $subject, $message, $headers);

}

?>