Hi guys - we've got an answer now.
We have a number of carts and they're all targeted at the UK and Europe. Like other non-US cart owners, we have to provide our invoices in UK date format to comply with tax requirements.
3dCart can custom code it for us, for a price.
Just thought
this was interesting: the rest of the world seems to use dd/mm/yyyy. Wouldn't it be a good idea if 3dCart had an option in the main cart options to present dates in dd/mm/yyyy instead of mm/dd/yyyy for invoicing?