diff --git a/src/corelib/time/qdatetimeparser.cpp b/src/corelib/time/qdatetimeparser.cpp
index cce32e7ad22..56381125460 100644
--- a/src/corelib/time/qdatetimeparser.cpp
+++ b/src/corelib/time/qdatetimeparser.cpp
@@ -2161,7 +2161,10 @@ bool QDateTimeParser::skipToNextSection(int index, const QDateTime &current, QSt
     if (node.type != TimeZoneSection || current.timeSpec() == Qt::OffsetFromUTC) {
         const QDateTime maximum = getMaximum();
         const QDateTime minimum = getMinimum();
-        Q_ASSERT(current >= minimum && current <= maximum);
+        // Range from minimum to maximum might not contain current if an earlier
+        // field's value was full-width but out of range. In such a case the
+        // parse is already headed for Invalid, so it doesn't matter that we get
+        // the wrong range of values for the current field here.
 
         QDateTime tmp = current;
         if (!setDigit(tmp, index, min) || tmp < minimum)
diff --git a/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp b/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
index f9c6afc795c..ce17a562354 100644
--- a/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
+++ b/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
@@ -3271,6 +3271,8 @@ void tst_QDateTime::fromStringStringFormat_data()
             << u"2008-10-13 UTC+01:011.50"_s << u"yyyy-MM-dd thh.mm"_s << 1900 << QDateTime();
     QTest::newRow("invalid-time-spec:empty")
             << u"2001-09-15T09:33:01.001 "_s << u"yyyy-MM-ddThh:mm:ss.z t"_s << 1900 << QDateTime();
+    QTest::newRow("invalid-month-year<min") // This used to fail an unfounded assertion.
+            << u"0024:91:06 08:52:20"_s << u"yyyy:MM:dd HH:mm:ss"_s << 1900 << QDateTime();
 #if QT_CONFIG(timezone)
     QTimeZone southBrazil("America/Sao_Paulo");
     if (southBrazil.isValid()) {