diff --git a/app/Services/ImportProcessor.php b/app/Services/ImportProcessor.php
index 1c5bbd1..e44af1e 100644
--- a/app/Services/ImportProcessor.php
+++ b/app/Services/ImportProcessor.php
@@ -24,6 +24,7 @@
 use App\Models\Person\PersonPhone;
 use App\Models\Person\PersonType;
 use App\Models\Person\PhoneType;
+use Exception;
 use Illuminate\Contracts\Auth\Authenticatable;
 use Illuminate\Database\QueryException;
 use Illuminate\Support\Carbon;
@@ -2987,6 +2988,16 @@ private function findOrCreatePersonId(array $p): ?int
                     $data['full_name'] = trim($fn.' '.$ln);
                 }
             }
+
+            // normalise birthday date
+            if (!empty($data['birthday'])) {
+                try {
+                    $data['birthday'] = date('Y-m-d', strtotime($data['birthday']));
+                } catch (Exception $e) {
+                    Log::warning('ImportProcessor::findOrCreatePersonId ' . $e->getMessage());
+                } 
+                
+            }
             // ensure required group/type ids
             $data['group_id'] = $data['group_id'] ?? $this->getDefaultPersonGroupId();
             $data['type_id'] = $data['type_id'] ?? $this->getDefaultPersonTypeId();