Date picker not appearing in 4.7.23 and Joomla 3.7.5
The problem appears to be a misconfiguration on your site which results in javascript files failing to load.
Inspecting the source of http://www.cahpi.ca/demodate shows a list of scripts which should be loading. For example, &lt;script type="text/javascript" src="/components/com_civicrm/civicrm/bower_components/jquery-ui/jquery-ui.min.js?r=YiBsO"&gt; but trying to open that url, http://www.cahpi.ca/components/com_civicrm/civicrm/bower_components/jquery-ui/jquery-ui.min.js?r=YiBsO results in a redirect to the homepage.
That's what you need to fix.