icingaweb2/modules/monitoring/application/views/scripts/show/components/downtime.phtml

<?php

$cf = $this->getHelper('CommandForm');

$data = array('host' => $object->host_name);
if ($object->service_description) {
    $data['service'] = $object->service_description;
}


$list = array();
foreach ($object->downtimes as $downtime) {
    $deleteData = $data;
    $deleteData['downtimeid'] = $downtime->id;

    // TODO: This needs improvement
    if ((int) $downtime->is_in_effect) {
        $state = 'in downtime since ' . $this->timeSince($downtime->start);
    } else {
        if ($downtime->is_fixed) {
            $state = 'scheduled ' . $this->timeUntil($downtime->start);
        } else {
            $state = 'scheduled flexible ' . $this->timeUntil($downtime->start);
        }
    }

    $iconForm = $cf->iconSubmitForm(
        'img/icons/remove_petrol.png',
        'Remove Downtime',
        'link-like',
        'removedowntime',
        $deleteData
    );

    $text = $this->escape($downtime->comment);

    $list[] = sprintf(
        '<tr><th>%s</th><td data-base-target="_self">%s %s: %s</td></tr>',
        $this->escape($downtime->author),
        $iconForm,
        $state,
        $text
    );
}

?>
<tr>
  <th><?= $this->translate('Downtimes') ?></th>
  <td>
    <a href="<?= $this->href('monitoring/command/scheduleDowntime', $data) ?>"><?= $this->icon('in_downtime_petrol.png') ?> <?= $this->translate('Schedule downtime') ?></a>
  </td>
</tr>
<?= implode("\n", $list) ?>