Now it is working here, I connect the buttons action to the calendar using: currentDate.setFullYear(aNewYear, aNewMonth, aNewDay); calendar.selectedDate = new Date(aNewYear, aNewMonth, aNewDay); calendar.update(); Now I have a calendar and a custom navigation bar thanks for all!

@Nathaniel why do you believe this is "sloppy"?! Actually it is the exact difference. In common UX concepts you select only with left mouse button and show a context menu with right mouse button. To get events you can install an eventfilter on the view: calendarWidget->findChild<QTableView*>("qt_calendar_calendarview")->installEventFilter( this );

Hi The signal Activated also triggers for db clicks. so connect(ui->calendarWidget, QCalendarWidget::activated, this , MainWindow::CalendarDBClick); and the slot function public slots: void CalendarDBClick(const QDate& Date) { setWindowTitle(Date.toString("dd.MM.yyyy")); } No need to subclass, just hook up signal.

@mrjj Oh thank you very much. It's a good thing to learn!

You're welcome ! If this answers your question, please update the thread title prepending [solved] so other forum uses may know a solution has been found :) Also, consider up-voting answer(s) that helped you, it will make it easier for other users to find them.

you mean the calendar Widget ? As far as I know, it has no concept of appointments so even that it supports styling, it is not really possible to by styling. But, you can quite easy draw it yourself and add the needed support for appointment. https://wiki.qt.io/How_to_create_a_custom_calender_widget

Hi and welcome to devnet, You should take a look at the sources of QCalendarWidget, you'll have all the information you want there