Adding a calendar / date picker to Joomla form

This is how you add a calendar / date picker to Joomla form.

add the following code to your
xx.html.php class

$document = &JFactory::getDocument();
$document->addScript("includes/js/joomla.javascript.js");

JHTML::_('behavior.calendar');

and add the following code to the default.php template file

All those codes above will have a calendar / date picker close to the input field.

Enjoy your coding.