kekrozsak/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/datetime_widget.html.php

<?php if ($widget == 'single_text'): ?>
    <?php echo $view['form']->block($form, 'form_widget_simple'); ?>
<?php else: ?>
    <div <?php echo $view['form']->block($form, 'widget_container_attributes') ?>>
        <?php echo $view['form']->widget($form['date']).' '.$view['form']->widget($form['time']) ?>
    </div>
<?php endif ?>