how to set default for text_date field? #1245

$cmb->add_field( array(
	'name'        => 'Date',
	'id'          => 'date',
	'type'        => 'text_date',
	'date_format' => 'j/n/Y',
	'default'     => date( 'j/n/Y' ),
	'attributes' => array(
		'required' => 'required',
		'data-datepicker' => json_encode( array(
			'defaultDate' => null
		)),
	),
	'classes'    => array( 'required' ),
) );