Bootstrap DatePicker - Onchange

Bootstrap 4

The eonasdan datepicker plugin is no longer supported in Bootstrap 4, but there is a new plugin: https://tempusdominus.github.io/bootstrap-4

"Tempus Dominus is the successor to the very popular Eonasdan/bootstrap-datetimepicker"

To detect the change event, use:

$("#datetimepicker1").on("change.datetimepicker", function (e) {
    if (e.oldDate !== e.date) {
        alert('You picked: ' + new Date(e.date).toLocaleDateString('en-US'))
    }
})

Datepicker demo: https://codeply.com/p/kS0t1Ko61K

---

Bootstrap 3 (original answer)

According to the docs, the event is dp.change:

$('#myDatePicker').datetimepicker().on('dp.change',function(e){
    console.log(e)
})

http://www.codeply.com/go/5cBJkEHiAt

You can try this:

$("#myDatePicker").datetimepicker().on('changeDate', function(e) {
    alert('date has changed!');
});

Bootstrap doc reference: changeDate