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

<tr>
    <th><?= $this->translate('Downtimes'); ?></th>
    <td>
        <?php if ($this->hasPermission('monitoring/command/downtime/schedule')) {
            /** @var \Icinga\Module\Monitoring\Object\MonitoredObject $object */
            if ($object->getType() === $object::TYPE_HOST) {
                echo $this->qlink(
                    $this->translate('Schedule downtime'),
                    'monitoring/host/schedule-downtime',
                    array('host_name' => $object->getName()),
                    array(
                        'icon'              => 'plug',
                        'data-base-target'  => '_self',
                        'title'             => $this->translate(
                            'Schedule a downtime to suppress all problem notifications within a specific period of time'
                        )
                    )
                );
            } else {
                echo $this->qlink(
                    $this->translate('Schedule downtime'),
                    'monitoring/service/schedule-downtime',
                    array('host_name' => $object->getHost()->getName(), 'service_description' => $object->getName()),
                    array(
                        'icon'              => 'plug',
                        'data-base-target'  => '_self',
                        'title'             => $this->translate(
                            'Schedule a downtime to suppress all problem notifications within a specific period of time'
                        )
                    )
                );
            }
        } else {
            echo '&#45;';
        } ?>
    </td>
</tr>

<?php

foreach ($object->downtimes as $downtime) {
    // Ticket hook sample
    $commentText = $this->tickets ? preg_replace_callback(
        $this->tickets->getPattern(),
        array($this->tickets, 'createLink'),
        $this->escape($downtime->comment)
    ) : $this->escape($downtime->comment);

    if ((bool) $downtime->is_in_effect) {
        $state = 'in downtime since ' . $this->timeSince($downtime->start);
    } else {
        if ((bool) $downtime->is_fixed) {
            $state = 'scheduled ' . $this->timeUntil($downtime->start);
        } else {
            $state = 'scheduled flexible ' . $this->timeUntil($downtime->start);
        }
    }

    ?>
    <tr>
        <th><?= $this->escape($downtime->author_name); ?></th>
        <td data-base-target="_self">
            <?php if (isset($delDowntimeForm)) { // Form is unset if the current user lacks the respective permission
                $delDowntimeForm = clone $delDowntimeForm;
                $delDowntimeForm->populate(array('downtime_id' => $downtime->id));
                echo $delDowntimeForm;
            } ?>
            <span class="sr-only"><?= $this->translate('Downtime'); ?></span><?= $state; ?><?= str_replace(array('\r\n', '\n'), '<br>', $commentText); ?>
        </td>
    </tr>
<?php } // endforeach ?>