I know it is a joke, but 64bit fixed-point representation with nanosecond resolution has just ~585 years of range. With 1e100 years of range needed to measure out to the heat-death of the universe, you end up with resolution of ~5e80 years, which is 60 orders of magnitude longer than the current age of the universe.
It is easy to run out of bits when trying to use a single number as both an absolute date/time, and to compute relative durations between timestamps with reasonable precision. I've lost track of the number of bugs I've fixed where someone assumed a double would be big enough without doing the math.
It is easy to run out of bits when trying to use a single number as both an absolute date/time, and to compute relative durations between timestamps with reasonable precision. I've lost track of the number of bugs I've fixed where someone assumed a double would be big enough without doing the math.