Not exactly a direct answer, but this is where my first search started me.
To save a Date/Time field into craft using a jQuery dateTime picker, you can create a small plugin and place this in the init
method of the primay plugin file (Craft 2x).
MyPluginFile.php
public function init()
{
parent::init();
craft()->on('sproutForms.onBeforeSaveEntry', function (Event $event) {
if (craft()->request->isCpRequest()) {
// Entry was saved from within the CP so we can ignore it.
} else {
if ($event->params['isNewEntry']) {
$entry = $event->params['entry'];
// Get the current time zone from the system.
date_default_timezone_set(craft()->timezone);
$entry->setContentFromPost(array(
'eventDate' => date('Y-m-d', strtotime(craft()->request->getPost('fields.eventDate'))),
'startTime' => date('Y-m-d H:i:s', strtotime(craft()->request->getPost('fields.startTime'))),
'endTime' => date('Y-m-d H:i:s', strtotime(craft()->request->getPost('fields.endTime'))),
));
}
}
});
}