diff --git a/backend/lib/Interpreter/Interpreter.php b/backend/lib/Interpreter/Interpreter.php
index 10105c4..94f26ba 100644
--- a/backend/lib/Interpreter/Interpreter.php
+++ b/backend/lib/Interpreter/Interpreter.php
@@ -180,12 +180,12 @@ abstract class Interpreter implements InterpreterInterface {
 	 * @return float
 	 */
 	protected static function parseDateTimeString($string, $now) {
-		if ($ts = strtotime($string, $now / 1000)) {
-			return $ts * 1000;
-		}
-		elseif (ctype_digit($string)) {
+		if (ctype_digit($string)) {
 			return (float) $string;
 		}
+		elseif ($ts = strtotime($string, $now / 1000)) {
+			return $ts * 1000;
+		}
 		else {
 			throw new \Exception('Invalid time format: ' . $string);
 		}
@@ -197,4 +197,4 @@ abstract class Interpreter implements InterpreterInterface {
 	public function getUuid() { return $this->channel->getUuid(); }
 }
 
-?>
\ No newline at end of file
+?>