diff --git a/app/Http/Controllers/Chart/AccountController.php b/app/Http/Controllers/Chart/AccountController.php
index b57bee22d8..00c6a5c661 100644
--- a/app/Http/Controllers/Chart/AccountController.php
+++ b/app/Http/Controllers/Chart/AccountController.php
@@ -472,6 +472,7 @@ class AccountController extends Controller
      */
     private function periodByCurrency(Carbon $start, Carbon $end, Account $account, TransactionCurrency $currency): array
     {
+        app('log')->debug(sprintf('Now in periodByCurrency("%s", "%s", %s, "%s")', $start->format('Y-m-d'), $end->format('Y-m-d'), $account->id, $currency->code));
         $locale  = app('steam')->getLocale();
         $step    = $this->calculateStep($start, $end);
         $result  = [
@@ -481,6 +482,13 @@ class AccountController extends Controller
         ];
         $entries = [];
         $current = clone $start;
+        app('log')->debug(sprintf('Step is %s', $step));
+
+        // fix for issue https://github.com/firefly-iii/firefly-iii/issues/8041
+        // have to make sure this chart is always based on the balance at the END of the period.
+        // This period depends on the size of the chart
+        $current = app('navigation')->endOfX($current, $step, null);
+        app('log')->debug(sprintf('$current date is %s', $current->format('Y-m-d')));
         if ('1D' === $step) {
             // per day the entire period, balance for every day.
             $format   = (string)trans('config.month_and_day_js', [], $locale);
@@ -497,10 +505,13 @@ class AccountController extends Controller
         }
         if ('1W' === $step || '1M' === $step || '1Y' === $step) {
             while ($end >= $current) {
+                app('log')->debug(sprintf('Current is: %s', $current->format('Y-m-d')));
                 $balance         = (float)app('steam')->balance($account, $current, $currency);
                 $label           = app('navigation')->periodShow($current, $step);
                 $entries[$label] = $balance;
                 $current         = app('navigation')->addPeriod($current, $step, 0);
+                // here too, to fix #8041, the data is corrected to the end of the period.
+                $current = app('navigation')->endOfX($current, $step, null);
             }
         }
         $result['entries'] = $entries;
diff --git a/resources/views/layout/default.twig b/resources/views/layout/default.twig
index 56d9738485..5553f2b362 100644
--- a/resources/views/layout/default.twig
+++ b/resources/views/layout/default.twig
@@ -217,7 +217,7 @@
 
 {# Moment JS #}
 <script src="v1/js/lib/moment.min.js?v={{ FF_VERSION }}" type="text/javascript" nonce="{{ JS_NONCE }}"></script>
-<script src="v1/js/lib/moment/{{ language }}.js?v={{ FF_VERSION }}" type="text/javascript"
+<script src="v1/js/lib/moment/{{ language|replace({'-':'_'}) }}.js?v={{ FF_VERSION }}" type="text/javascript"
         nonce="{{ JS_NONCE }}"></script>
 
 {# All kinds of variables. #}