diff --git a/src/corelib/time/qdatetimeparser.cpp b/src/corelib/time/qdatetimeparser.cpp
index 9117e743750..e699bdeb240 100644
--- a/src/corelib/time/qdatetimeparser.cpp
+++ b/src/corelib/time/qdatetimeparser.cpp
@@ -2198,21 +2198,25 @@ QString QDateTimeParser::stateName(State s) const
     }
 }
 
+// Only called when we want only one of date or time; use UTC to avoid bogus DST issues.
 bool QDateTimeParser::fromString(const QString &t, QDate *date, QTime *time) const
 {
-    QDateTime datetime;
-    if (!fromString(t, &datetime))
+    QDateTime val(QDate(1900, 1, 1).startOfDay(Qt::UTC));
+    const StateNode tmp = parse(t, -1, val, false);
+    if (tmp.state != Acceptable || tmp.conflicts)
         return false;
 
     if (time) {
-        const QTime t = datetime.time();
+        Q_ASSERT(!date);
+        const QTime t = tmp.value.time();
         if (!t.isValid())
             return false;
         *time = t;
     }
 
     if (date) {
-        const QDate d = datetime.date();
+        Q_ASSERT(!time);
+        const QDate d = tmp.value.date();
         if (!d.isValid())
             return false;
         *date = d;
@@ -2220,7 +2224,8 @@ bool QDateTimeParser::fromString(const QString &t, QDate *date, QTime *time) con
     return true;
 }
 
-bool QDateTimeParser::fromString(const QString &t, QDateTime* datetime) const
+// Only called when we want both date and time; default to local time.
+bool QDateTimeParser::fromString(const QString &t, QDateTime *datetime) const
 {
     QDateTime val(QDate(1900, 1, 1).startOfDay());
     const StateNode tmp = parse(t, -1, val, false);
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index b150827a4d0..81b70b5f903 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -223,7 +223,9 @@ QDateTimeEdit::QDateTimeEdit(QTime time, QWidget *parent)
   \internal
 */
 QDateTimeEdit::QDateTimeEdit(const QVariant &var, QMetaType::Type parserType, QWidget *parent)
-    : QAbstractSpinBox(*new QDateTimeEditPrivate, parent)
+    : QAbstractSpinBox(*new QDateTimeEditPrivate(
+                           parserType == QMetaType::QDateTime ? Qt::LocalTime : Qt::UTC),
+                       parent)
 {
     Q_D(QDateTimeEdit);
     d->parserType = parserType;
@@ -1734,16 +1736,17 @@ QDateEdit::~QDateEdit()
 */
 
 
-QDateTimeEditPrivate::QDateTimeEditPrivate()
-    : QDateTimeParser(QMetaType::QDateTime, QDateTimeParser::DateTimeEdit, QCalendar())
+QDateTimeEditPrivate::QDateTimeEditPrivate(Qt::TimeSpec timeSpec)
+    : QDateTimeParser(QMetaType::QDateTime, QDateTimeParser::DateTimeEdit, QCalendar()),
+      spec(timeSpec)
 {
     fixday = true;
     type = QMetaType::QDateTime;
     currentSectionIndex = FirstSectionIndex;
 
     first.pos = 0;
-    minimum = QDATETIMEEDIT_COMPAT_DATE_MIN.startOfDay();
-    maximum = QDATETIMEEDIT_DATE_MAX.endOfDay();
+    minimum = QDATETIMEEDIT_COMPAT_DATE_MIN.startOfDay(spec);
+    maximum = QDATETIMEEDIT_DATE_MAX.endOfDay(spec);
     readLocaleSettings();
 }
 
diff --git a/src/widgets/widgets/qdatetimeedit_p.h b/src/widgets/widgets/qdatetimeedit_p.h
index 5830caaba3e..550653d731b 100644
--- a/src/widgets/widgets/qdatetimeedit_p.h
+++ b/src/widgets/widgets/qdatetimeedit_p.h
@@ -70,7 +70,7 @@ class Q_AUTOTEST_EXPORT QDateTimeEditPrivate : public QAbstractSpinBoxPrivate, p
 {
     Q_DECLARE_PUBLIC(QDateTimeEdit)
 public:
-    QDateTimeEditPrivate();
+    QDateTimeEditPrivate(Qt::TimeSpec timeSpec = Qt::LocalTime);
 
     void init(const QVariant &var);
     void readLocaleSettings();
@@ -153,7 +153,7 @@ public:
     bool focusOnButton = false;
 #endif
 
-    Qt::TimeSpec spec = Qt::LocalTime;
+    Qt::TimeSpec spec;
 };
 
 
diff --git a/tests/auto/widgets/widgets/qdatetimeedit/tst_qdatetimeedit.cpp b/tests/auto/widgets/widgets/qdatetimeedit/tst_qdatetimeedit.cpp
index ad16fcc79fd..9211800eb34 100644
--- a/tests/auto/widgets/widgets/qdatetimeedit/tst_qdatetimeedit.cpp
+++ b/tests/auto/widgets/widgets/qdatetimeedit/tst_qdatetimeedit.cpp
@@ -1358,7 +1358,7 @@ void tst_QDateTimeEdit::editingRanged_data()
         << QDate(2010, 12, 30) << QTime()
         << QDate(2011, 1, 2) << QTime()
         << QString::fromLatin1("01012011")
-        << QDateTime(QDate(2011, 1, 1), QTime());
+        << QDateTime(QDate(2011, 1, 1), QTime(), Qt::UTC);
 }
 
 void tst_QDateTimeEdit::editingRanged()
@@ -3141,9 +3141,9 @@ void tst_QDateTimeEdit::hour12Test()
 void tst_QDateTimeEdit::yyTest()
 {
     testWidget->setDisplayFormat("dd-MMM-yy");
-    testWidget->setTime(QTime(0, 0, 0));
     testWidget->setDateRange(QDate(2005, 1, 1), QDate(2010, 12, 31));
     testWidget->setDate(testWidget->minimumDate());
+    testWidget->setTime(QTime(12, 0, 0)); // Mid-day to avoid DST artefacts.
     testWidget->setCurrentSection(QDateTimeEdit::YearSection);
 
     QString jan = QLocale::system().monthName(1, QLocale::ShortFormat);