fix issue #11663

Author: liucf

src/Query/Builder.php

@@ -186,7 +186,11 @@ protected function addArrayOfWheres($column, $boolean, $method = 'where')
 
     public function prepareValueAndOperator($value, $operator, $useDefault = false)
     {
-        $loweredOperator = strtolower((string) $operator);
+        if($operator instanceof DateTimeInterface){
+            $loweredOperator = Carbon::parse($operator)->toDateTimeString();
+        }else{
+            $loweredOperator = strtolower((string) $operator);
+        }
 
         if ($useDefault) {
             return [$operator, '='];