all-in-one-event-calendar/public/admin/box_profile_timezone.php

<h3><a name="ai1ec"><?php
_e( 'All-in-One Event Calendar', AI1EC_PLUGIN_NAME );
?></a></h3>
<table class="ai1ec-form">
    <tbody>
        <tr>
            <td class="ai1ec-first">
                <label for="ai1ec_user_timezone">
                    <?php _e( 'Your preferred timezone', AI1EC_PLUGIN_NAME ); ?>?
                </label>
            </td>
            <td>
                <select name="ai1ec_user_timezone" id="ai1ec_user_timezone">
                <?php echo $tz_selector; ?>
                </select>
            </td>
        </tr>
    </tbody>
</table>