diff --git a/app/Api/V2/Controllers/Chart/BalanceController.php b/app/Api/V2/Controllers/Chart/BalanceController.php
index 582e226d97..2886493cfc 100644
--- a/app/Api/V2/Controllers/Chart/BalanceController.php
+++ b/app/Api/V2/Controllers/Chart/BalanceController.php
@@ -84,10 +84,6 @@ class BalanceController extends Controller
         $queryParameters = $request->getParameters();
         $accounts        = $this->getAccountList($queryParameters);
 
-        // move date to end of day
-        $queryParameters['start']->startOfDay();
-        $queryParameters['end']->endOfDay();
-
         // prepare for currency conversion and data collection:
         /** @var TransactionCurrency $default */
         $default         = app('amount')->getDefaultCurrency();
diff --git a/app/Api/V2/Request/Chart/ChartRequest.php b/app/Api/V2/Request/Chart/ChartRequest.php
index bbe06b0202..6eadbe5837 100644
--- a/app/Api/V2/Request/Chart/ChartRequest.php
+++ b/app/Api/V2/Request/Chart/ChartRequest.php
@@ -53,10 +53,10 @@ class ChartRequest extends FormRequest
         $queryParameters = QueryParameters::cast($this->all());
 
         return [
-            'start'       => $this->dateOrToday($queryParameters, 'start'),
-            'end'         => $this->dateOrToday($queryParameters, 'end'),
+            'start'       => $this->dateOrToday($queryParameters, 'start')->startOfDay(),
+            'end'         => $this->dateOrToday($queryParameters, 'end')->endOfDay(),
             'preselected' => $this->stringFromQueryParams($queryParameters, 'preselected', 'empty'),
-            'period'      => $this->stringFromQueryParams($queryParameters, 'period', '1M'),
+            'period'      => $this->stringFromFilterParams($queryParameters, 'period', '1M'),
             'accounts'    => $this->arrayOfStrings($queryParameters, 'accounts'),
             // preselected heeft maar een paar toegestane waardes, dat moet ook goed gaan.
             //            'query'         => $this->arrayOfStrings($queryParameters, 'query'),
@@ -80,12 +80,14 @@ class ChartRequest extends FormRequest
         return [
             'fields'  => JsonApiRule::notSupported(),
             'filter'  => ['nullable', 'array',
-                new IsValidFilter(['start', 'end', 'preselected', 'accounts']),
-                new IsFilterValueIn('preselected', config('firefly.preselected_accounts')),
+                          new IsValidFilter(['start', 'end', 'preselected', 'accounts', 'period']),
+                          new IsFilterValueIn('preselected', config('firefly.preselected_accounts')),
             ],
             'include' => JsonApiRule::notSupported(),
             'page'    => JsonApiRule::notSupported(),
             'sort'    => JsonApiRule::notSupported(),
+            //'start'   => 'required|date|after:1900-01-01|before:2099-12-31',
+            //'end'     => 'required|date|after_or_equal:start|before:2099-12-31|after:1900-01-01',
         ];
 
         //        return [
diff --git a/app/Support/Http/Api/ParsesQueryFilters.php b/app/Support/Http/Api/ParsesQueryFilters.php
index be70743676..a3d83328fb 100644
--- a/app/Support/Http/Api/ParsesQueryFilters.php
+++ b/app/Support/Http/Api/ParsesQueryFilters.php
@@ -35,6 +35,7 @@ trait ParsesQueryFilters
         $date  = today();
 
         $value = $parameters->filter()?->value($field, date('Y-m-d'));
+
         if (is_array($value)) {
             Log::error(sprintf('Multiple values for date field "%s". Using first value.', $field));
             $value = $value[0];
@@ -65,4 +66,8 @@ trait ParsesQueryFilters
     {
         return (string) ($parameters->page()[$field] ?? $default);
     }
+    private function stringFromFilterParams(QueryParameters $parameters, string $field, string $default): string
+    {
+        return (string)$parameters->filter()?->value($field, $default) ?? $default;
+    }
 }