CalendarEntryAjax::getEarliestEvent

protected function getEarliestEvent(array $entries): array
{
	return array_reduce($entries, static function($firstEntry, $entry) {
		if (!$firstEntry)
		{
			return $entry;
		}
		if (strtotime($entry['DATE_FROM']) < strtotime($firstEntry['DATE_FROM']))
		{
			return $entry;
		}
		return $firstEntry;
	});
}