(PressDemocrat) - It was only a few years ago that you actually had to check a calendar to remember the birthday of a distant friend or in-law. Then, Facebook came along and changed everything, jostling its 1 billion users to bestow birthday wishes on all of their Facebook friends, including nearly-forgotten acquaintances and classmates they last saw two decades ago. Now, Facebook is trying to capitalize on that ubiquitous feature that so many of us rely on. It has opened a new gift store, encouraging its U.S. customers to send real, physical gifts to each other on the website so many check every day.