Hi,
In the view "frontend | your_frontend_template | ordermarket | invoice" please replace
<?php echo JText::_('DATE') . ': ' . hikamarket::getDate(@$this->element->order_created, '%d %B %Y '); ?>
By
<?php
$date = (!empty($this->element->order_invoice_created)) ? $this->element->order_invoice_created : @$this->element->order_created;
echo JText::_('DATE') . ': ' . hikamarket::getDate($date, '%d %B %Y ');
?>
It will use the date of the creation of the invoice (when the order has been confirmed) if the date is set.
(This modification will be include in the next HikaMarket release)
Regards,