fullCalendar today button custom behavior

I have troubles with fullCalendar. I am using week view(defaultView: 'basicWeek'), and the toolbar buttons 'today', 'prev', 'next'. And when I click 'today' button is clicked calendar navigates back to current week, but date selection doesn't change. I want calendar to navigate to current week and select today date on the calendar. But I am having troubles with redefining 'today' button click event.

Code sample: https://plnkr.co/edit/dv9yiq1CdJxfFTsDg4Yx?p=preview

defaultView: 'basicWeek',
            defaultDate: '2016-01-12',
            selectable: true,
            selectHelper: true,
            select: function(start, end) {
              console.log('select');
                var title = prompt('Event Title:');
                var eventData;
                if (title) {
                    eventData = {
                        title: title,
                        start: start,
                        end: end
                    };
                    $('#calendar').fullCalendar('renderEvent', eventData, true); 
                }
                $('#calendar').fullCalendar('unselect');
            }

I want a popup(alert) for today date to appear when I clicked 'today' button in this case.So basicly the button click not only navigate me to current week, but to select current day.