Although most U.S. employers do offer paid vacation days, by law, they don’t have to offer any paid vacation days at all. More shocking, however, is the fact that even when Americans are given paid time off, many choose not to use their vacation days. In fact, a 2017 Expedia survey found that on average Americans fail to use 3 paid vacation days per year, which amounts to billions of lost vacation days nationwide. If you think this is normal, however, think again. In all other developed nations, paid vacation time is not only the law but happens on a much wider scale.