The wxCalendarEvent class is used together with wxCalendarCtrl.
wxDateTime::WeekDay GetWeekDay() const
Returns the week day on which the user clicked in EVT_CALENDAR_WEEKDAY_CLICKED handler. It doesn't make sense to call this function in other handlers.
void SetWeekDay(wxDateTime::WeekDay day)
Sets the week day carried by the event, normally only used by the library internally.