The date when the pre-order will begin is much more important than you think. On the same date, the devices will be unveiled at a special event in New York City. Then, as the report say, right after the event the devices will start the pre-ordering. However, there is nothing yet confirmed, neither said, about when the pre-ordering will end. Many deals may occur the pre-ordering campaign, as for example the Gear VR handset will be also coming with a pre-order of any of the devices.
Also, keep it in mind that nothing is yet confirmed by Samsung, and yet still remains a rumor. Similar report might be coming for the US markets, will they have any pre-orders available for the devices.