Steps to reproduce the issue

Create a form field of type calendar and set date format for example format="%Y-%m-%d"

Expected result

Should be same date format when creating or editing a records.

Actual result

When trying create new record and select date, show correctly date format, but when edit a record show date in format Y-m-d H:i:s

System information (as much as possible)

joomla 3.4.8

Additional comments

libraries\joomla\form\fields\calendar.php always date value formated by default format Y-m-d H:i:s

change
line 144 $format = preg_replace('/[\\%]/', '', $this->format);
line 168 $this->value = JFactory::getDate()->format($format);
line 187 $this->value = $date->format($format, true, false);
line 202 $this->value = $date->format($format, true, false);
line 212 return JHtml::('calendar', $this->value, $this->name, $this->id, $this->format, $attributes);
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