Hi,
Via the menu System > Emails, you have to edit the email "order creation notification", then in the HTML version part, replace:
JText::sprintf('ORDER_CREATION_SUCCESS_ON_WEBSITE_AT_DATE',$url,HIKASHOP_LIVE, hikashop_getDate(time(),'%d %B %Y'), hikashop_getDate(time(),'%H:%M'))
By:
JText::sprintf('ORDER_CREATION_SUCCESS_ON_WEBSITE_AT_DATE',$url,hikashop_getDate(time(),'%H:%M'), hikashop_getDate(time(),'%d %B %Y'), HIKASHOP_LIVE)
Same thing in the Preload part of the email.
If the informations are still not as desired, you have to change the order of the elements in the JText function.