diff --git a/src/corelib/tools/qdatetimeparser.cpp b/src/corelib/tools/qdatetimeparser.cpp
index 18c44c3a17..e6afd510fd 100644
--- a/src/corelib/tools/qdatetimeparser.cpp
+++ b/src/corelib/tools/qdatetimeparser.cpp
@@ -1341,12 +1341,33 @@ QDateTimeParser::scanString(const QDateTime &defaultValue,
 
     const QDate date(year, month, day);
     const QTime time(hour, minute, second, msec);
-    return StateNode(
+    const QDateTime when =
 #if QT_CONFIG(timezone)
-                     tspec == Qt::TimeZone ? QDateTime(date, time, timeZone) :
+            tspec == Qt::TimeZone ? QDateTime(date, time, timeZone) :
 #endif
-                     QDateTime(date, time, tspec, zoneOffset),
-                     state, padding, conflicts);
+            QDateTime(date, time, tspec, zoneOffset);
+
+    // If hour wasn't specified, check the default we're using exists on the
+    // given date (which might be a spring-forward, skipping an hour).
+    if (parserType == QVariant::DateTime && !(isSet & HourSectionMask) && !when.isValid()) {
+        qint64 msecs = when.toMSecsSinceEpoch();
+        // Fortunately, that gets a useful answer ...
+        const QDateTime replace =
+#if QT_CONFIG(timezone)
+            tspec == Qt::TimeZone
+            ? QDateTime::fromMSecsSinceEpoch(msecs, timeZone) :
+#endif
+            QDateTime::fromMSecsSinceEpoch(msecs, tspec, zoneOffset);
+        const QTime tick = replace.time();
+        if (replace.date() == date
+            && (!(isSet & MinuteSection) || tick.minute() == minute)
+            && (!(isSet & SecondSection) || tick.second() == second)
+            && (!(isSet & MSecSection)   || tick.msec() == msec)) {
+            return StateNode(replace, state, padding, conflicts);
+        }
+    }
+
+    return StateNode(when, state, padding, conflicts);
 }
 
 /*!
diff --git a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
index d460beafde..943805e228 100644
--- a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
+++ b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
@@ -2390,6 +2390,14 @@ void tst_QDateTime::fromStringStringFormat_data()
     QTest::newRow("data16") << QString("2005-06-28T07:57:30.001Z")
                             << QString("yyyy-MM-ddThh:mm:ss.zt")
                             << QDateTime(QDate(2005, 06, 28), QTime(07, 57, 30, 1), Qt::UTC);
+#if QT_CONFIG(timezone)
+    QTimeZone southBrazil("America/Sao_Paulo");
+    if (southBrazil.isValid()) {
+        QTest::newRow("spring-forward-midnight")
+            << QString("2008-10-19 23:45.678 America/Sao_Paulo") << QString("yyyy-MM-dd mm:ss.zzz t")
+            << QDateTime(QDate(2008, 10, 19), QTime(1, 23, 45, 678), southBrazil);
+    }
+#endif
     QTest::newRow("late") << QString("9999-12-31T23:59:59.999Z")
                           << QString("yyyy-MM-ddThh:mm:ss.zZ")
                           << QDateTime(QDate(9999, 12, 31), QTime(23, 59, 59, 999));