Import Scripts

<link rel="stylesheet" type="text/css" href="/portal/css/bootstrap-datetimepicker.min.css" />

<script type="text/javascript" src="/portal/js/bootstrap4/bootstrap.min.js"></script>
<script type="text/javascript" src="/portal/js/bootstrap-datetimepicker.min.js"></script>
<script type="text/javascript" src="/portal/js/jquery/jquery-1.12.1.min.js"></script>
<script type="text/javascript" src="/portal/js/moment-with-locales.js"></script>

Modelo Bootstrap 4 + datetimepicker

<div class="form-group row">
	<label for="static" class="col-sm-4 col-form-label text-right"><?= __('Closed') ?></label>
	<div class="col-sm-8">
		<script type="text/javascript">
			$(function() {
				$("#dt_closed").datetimepicker({
					format: 'YYYY-MM-DD HH:mm'
				});
			});
		</script>
		<?= $this->Form->input('closed', array(
			'type' => 'text',
			'id' => 'dt_closed',
			'label' => false,
			'class' => 'form-control',
		)); ?>
	</div>
</div>