diff --git a/src/corelib/compat/removed_api.cpp b/src/corelib/compat/removed_api.cpp
index bbf406c5e35..33bb2baeb4b 100644
--- a/src/corelib/compat/removed_api.cpp
+++ b/src/corelib/compat/removed_api.cpp
@@ -700,7 +700,7 @@ QCborError QCborStreamReader::lastError()
     return std::as_const(*this).lastError();
 }
 
-#include "qdatetime.h"
+#include "qdatetime.h" // also inlined API
 
 QDateTime::QDateTime(QDate date, QTime time, const QTimeZone &timeZone)
     : QDateTime(date, time, timeZone, TransitionResolution::LegacyBehavior) {}
diff --git a/src/corelib/time/qdatetime.h b/src/corelib/time/qdatetime.h
index 50cad473009..460dc15a697 100644
--- a/src/corelib/time/qdatetime.h
+++ b/src/corelib/time/qdatetime.h
@@ -35,28 +35,28 @@ public:
 #if __cpp_lib_chrono >= 201907L || defined(Q_QDOC)
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     Q_IMPLICIT constexpr QDate(std::chrono::year_month_day date) noexcept
-        : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
+        : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
     {}
 
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     Q_IMPLICIT constexpr QDate(std::chrono::year_month_day_last date) noexcept
-        : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
+        : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
     {}
 
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday date) noexcept
-        : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
+        : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
     {}
 
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday_last date) noexcept
-        : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
+        : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
     {}
 
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     static constexpr QDate fromStdSysDays(const std::chrono::sys_days &days) noexcept
     {
-        return QDate(stdSysDaysToJulianDay(days QT6_CALL_NEW_OVERLOAD_TAIL));
+        return QDate(stdSysDaysToJulianDay(days));
     }
 
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
@@ -177,9 +177,11 @@ private:
     static constexpr inline qint64 unixEpochJd() { return Q_INT64_C(2440588); }
 
 #if __cpp_lib_chrono >= 201907L
+#if !QT_CORE_REMOVED_SINCE(6, 7)
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
+#endif
     static constexpr qint64
-    stdSysDaysToJulianDay(const std::chrono::sys_days &days QT6_DECL_NEW_OVERLOAD_TAIL) noexcept
+    stdSysDaysToJulianDay(const std::chrono::sys_days &days) noexcept
     {
         const auto epochDays = days.time_since_epoch().count();
         // minJd() and maxJd() fit into 40 bits.
@@ -191,13 +193,6 @@ private:
         }
         return unixEpochJd() + epochDays;
     }
-
-#if QT_VERSION_MAJOR < 7 && !defined(QT_BOOTSTRAPPED)
-    static constexpr qint64 stdSysDaysToJulianDay(const std::chrono::sys_days &days) noexcept
-    {
-        return stdSysDaysToJulianDay(days QT6_CALL_NEW_OVERLOAD_TAIL);
-    }
-#endif // Qt < 7 and not bootstrapped
 #endif // __cpp_lib_chrono >= 201907L
 
     qint64 jd;