We don't have shopping sales like Black Friday after Thanksgiving in the US, but people (with money) can take advantage of the post-holiday sale in malls right now.
All the surplus items that weren't sold during the holiday season can still be had now. And for people with Christmas missions, trimmings and trees are surely sold at huge discounts now. You can just purchase the tree you really want and keep it in storage. After all, no matter what happens this coming year, Christmas is sure to come again in December.