Note: The values here are figured based upon 365.25 days per year; that's not quite the same as the way we round date differences. For instance, even if a leap year intervenes, we would usually consider 20040606 and 20050606 to be exactly one year apart, and by that, we usually mean 365 days. But they aren't. And really, it's worse than that, because the actual length of a year is 365.242190 days. So consider this a close approximation.