diff --git a/app/Rules/IsDateOrTime.php b/app/Rules/IsDateOrTime.php
index 23af02ac1d..44f47a032f 100644
--- a/app/Rules/IsDateOrTime.php
+++ b/app/Rules/IsDateOrTime.php
@@ -26,6 +26,7 @@ namespace FireflyIII\Rules;
 
 use Carbon\Carbon;
 use Carbon\Exceptions\InvalidDateException;
+use Carbon\Exceptions\InvalidFormatException;
 use Illuminate\Contracts\Validation\Rule;
 use Log;
 
@@ -67,6 +68,10 @@ class IsDateOrTime implements Rule
             } catch (InvalidDateException $e) {
                 Log::error(sprintf('"%s" is not a valid date: %s', $value, $e->getMessage()));
 
+                return false;
+            } catch(InvalidFormatException $e) {
+                Log::error(sprintf('"%s" is of an invalid format: %s', $value, $e->getMessage()));
+
                 return false;
             }
 
@@ -78,6 +83,10 @@ class IsDateOrTime implements Rule
         } catch (InvalidDateException $e) {
             Log::error(sprintf('"%s" is not a valid date or time: %s', $value, $e->getMessage()));
 
+            return false;
+        } catch(InvalidFormatException $e) {
+            Log::error(sprintf('"%s" is of an invalid format: %s', $value, $e->getMessage()));
+
             return false;
         }