View file Web Template Ktpl/package/templates/ktpl/assets/fields/age.tpl.php

<?php $this->addJSFromContext('templates/default/js/jquery-ui.js'); ?>
<?php $this->addJSFromContext('templates/default/js/i18n/jquery-ui/'.cmsCore::getLanguageName().'.js'); ?>
<?php $this->addCSSFromContext('templates/default/css/jquery-ui.css'); ?>

<?php if ($field->title) { ?><label for="<?php echo $field->id; ?>"><?php echo $field->getOption('date_title'); ?></label><?php } ?>

<?php echo html_datepicker($field->element_name, $field->data['date'], array('id'=>$field->id), array('yearRange' => '-120:+0')); ?>