diff --git a/kmymoney/kmymoney.cpp b/kmymoney/kmymoney.cpp
--- a/kmymoney/kmymoney.cpp
+++ b/kmymoney/kmymoney.cpp
@@ -1696,17 +1696,9 @@
   d->m_backupState = BACKUP_IDLE;
 
   QLocale locale;
-  int weekStart = locale.firstDayOfWeek();
-  int weekEnd = weekStart-1;
-  if (weekEnd < Qt::Monday) {
-    weekEnd = Qt::Sunday;
-  }
-  bool startFirst = (weekStart < weekEnd);
-  for (int i = 0; i < 8; ++i) {
-    if (startFirst)
-      d->m_processingDays.setBit(i, (i >= weekStart && i <= weekEnd));
-    else
-      d->m_processingDays.setBit(i, (i >= weekStart || i <= weekEnd));
+  for (auto const& weekDay: locale.weekdays())
+  {
+    d->m_processingDays.setBit(static_cast<int>(weekDay));
   }
   d->m_autoSaveTimer = new QTimer(this);
   d->m_progressTimer = new QTimer(this);
@@ -4221,9 +4213,9 @@
 
 bool KMyMoneyApp::isProcessingDate(const QDate& date) const
 {
-#ifdef KF5Holidays_FOUND
   if (!d->m_processingDays.testBit(date.dayOfWeek()))
     return false;
+#ifdef KF5Holidays_FOUND
   if (!d->m_holidayRegion || !d->m_holidayRegion->isValid())
     return true;
 
@@ -4236,7 +4228,6 @@
     return processingDay;
   }
 #else
-  Q_UNUSED(date);
   return true;
 #endif
 }
diff --git a/kmymoney/mymoney/mymoneyschedule.cpp b/kmymoney/mymoney/mymoneyschedule.cpp
--- a/kmymoney/mymoney/mymoneyschedule.cpp
+++ b/kmymoney/mymoney/mymoneyschedule.cpp
@@ -1534,6 +1534,7 @@
   if (processingCalendarPtr)
     return processingCalendarPtr->isProcessingDate(date);
 
+  /// @todo test against m_processingDays instead?  (currently only for tests)
   return date.dayOfWeek() < Qt::Saturday;
 }
 
diff --git a/kmymoney/mymoney/tests/mymoneyschedule-test.cpp b/kmymoney/mymoney/tests/mymoneyschedule-test.cpp
--- a/kmymoney/mymoney/tests/mymoneyschedule-test.cpp
+++ b/kmymoney/mymoney/tests/mymoneyschedule-test.cpp
@@ -1587,6 +1587,8 @@
 
 void MyMoneyScheduleTest::testProcessingDates()
 {
+  /// @todo extend test to cover application usage (with a processing calendar defined) ?
+
   // There should be no processing calendar defined so
   // make sure fall back works