edx-platform/lms/templates/peer_grading/peer_grading_closed.html

<section class="container peer-grading-container">
<h2>Peer Grading</h2>
    <p>The due date has passed, and
    % if use_for_single_location:
        peer grading for this problem is closed at this time.
    %else:
        peer grading is closed at this time.
    %endif
    </p>
</section>