diff --git a/lib/Model/Circle.php b/lib/Model/Circle.php
index 03c54e394..c1f026f5e 100644
--- a/lib/Model/Circle.php
+++ b/lib/Model/Circle.php
@@ -912,7 +912,9 @@ public function importFromDatabase(array $data, string $prefix = ''): IQueryRow
 			 ->setDescription($this->get($prefix . 'description', $data));
 
 		$creation = $this->get($prefix . 'creation', $data);
-		$this->setCreation(DateTime::createFromFormat('Y-m-d H:i:s', $creation)->getTimestamp());
+		$dateTime = DateTime::createFromFormat('Y-m-d H:i:s', $creation);
+		$timestamp = $dateTime ? $dateTime->getTimestamp() : (int) strtotime('Y-m-d H:i:s', $creation);
+		$this->setCreation($timestamp);
 
 		$this->setPopulation($this->getInt('population', $this->getSettings()));
 		$this->setPopulationInherited($this->getInt('populationInherited', $this->getSettings()));