To note. There is a similar problem with the date of creation.
In addition, the calendar icons are not displayed.
May be better to replace:
-for modified date
<?php /*?><i class="icon-calendar"></i> <?php echo JText::sprintf('COM_CONTENT_LAST_UPDATED', JHtml::_('date', $this->item->modified, JText::_('DATE_FORMAT_LC3'))); ?><?php */?>
<?php $this->item->modified = date("d.m.Y");?>
<?php echo JText::sprintf('COM_CONTENT_LAST_UPDATED', JHTML::_('date',$this->item->modified, date("d.m.Y"))); ?>
--->
<i class="icon-calendar"></i> <?php echo JText::sprintf('COM_CONTENT_LAST_UPDATED', JHtml::_('date', $this->item->modified, JText::_('DATE_FORMAT_LC3'))); ?>
-for created date
<?php echo JText::sprintf('COM_CONTENT_CREATED_DATE_ON', JHtml::_('date', $this->item->modified, JText::_('DATE_FORMAT_LC'))); ?>
--->
<i class="icon-calendar"></i> <?php echo JText::sprintf('COM_CONTENT_CREATED_DATE_ON', JHtml::_('date', $this->item->created, JText::_('DATE_FORMAT_LC3'))); ?>
