Steps to reproduce the issue

For a calendar form field you set the default value to "NOW" and add a new item.
To test you can edit any form with a calendar field.

Expected result

1. The actual user date and time shown or
2. The actual server date and time shown depending on the filter used

Actual result

The date and time is wrongly calculated with the actual server date and time as basis.
Must use UTC+0 as basis.

System information (as much as possible)

J 3.3.6

Additional comments

PR on GitHub
calendar.php
// Handle the special case for "now".
if (strtoupper($this->value) == 'NOW')
{
//$this->value = strftime($format);
$this->value = JFactory::getDate()->toSql();
}