diff --git a/src/qt/bantablemodel.cpp b/src/qt/bantablemodel.cpp
--- a/src/qt/bantablemodel.cpp
+++ b/src/qt/bantablemodel.cpp
@@ -113,7 +113,7 @@
             case Bantime:
                 QDateTime date = QDateTime::fromMSecsSinceEpoch(0);
                 date = date.addSecs(rec->banEntry.nBanUntil);
-                return date.toString(Qt::SystemLocaleLongDate);
+                return date.toString(QLocale().dateTimeFormat());
         }
     }
 
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -62,8 +62,8 @@
 namespace GUIUtil {
 
 QString dateTimeStr(const QDateTime &date) {
-    return date.date().toString(Qt::SystemLocaleShortDate) + QString(" ") +
-           date.toString("hh:mm");
+    return date.date().toString(QLocale().dateFormat(QLocale::ShortFormat)) +
+           QString(" ") + date.toString("hh:mm");
 }
 
 QString dateTimeStr(qint64 nTime) {