bootstrap 3 datetimepicker((eonasdan)) - e.date is undefined on "dp.show"

Question

I am using the eonasdan bootstrap 3 datepicker (v4.14.30). I try to read e.date value on dp.show and I get undefined. Has anyone had a similar problem?
Here is a jsfiddle of the issue. https://jsfiddle.net/adollphus/c79ddtok/

Thanks for your time.

Html

<div class="input-group date" style="max-width: 300px; float:left;">
    <input class="form-control model-edit-info input-sm"
    id="datepicker"
    type="text" />
    <span class="input-group-addon input-sm" style="cursor:pointer">
        <span class="glyphicon glyphicon-calendar"></span>
    </span>
</div>

Jquery

$(document).ready(function () {
    var datepicker = $('#datepicker').parent();
    datepicker.datetimepicker({
        locale: 'pl',
        format: 'YYYY-MM-DD',
        minDate: new Date(1900, 0, 1),
        showTodayButton: true,
        toolbarPlacement: 'top',
        widgetPositioning: {
            horizontal: 'right'
        }
    });
    datepicker.on('dp.show', function (e) {
        alert('e.date=' + e.date);
    });
});

Answer 1

replace dp.show with dp.change

datepicker.on('dp.show', function(e) {
    alert('e.date=' + e.date);
});

with

datepicker.on('dp.change', function(e) {
    alert('e.date=' + e.date);
});

here's the updated JSFiddle