Year
In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly 86,400 seconds (SI base unit), totalling exactly 31,557,600 seconds in the Julian astronomical year.
Time formatting and storage bugs
Certain problematic years occur so far in the future, well beyond the likely lifespan of the Earth, the Sun, humanity, and even past some predictions of the lifetime of the universe, that they are mainly referenced as matters of theoretical interest, jokes, or indications that a related problem is not truly solved for any reasonable definition of "solved".Note: these year values are based on an average year of exactly 365.2425 days, which matches the 4/100/400 leap year rules of the commonly used Gregorian calendar. Additional adjustments to the calendar over intervals this long are unavoidable, as the actual year is currently slightly shorter (about 365.242374 days) than assumed, the length of Earth's orbit around the Sun changes over time (tropical years are currently becoming shorter at a rate of about 0.53 seconds per century), and in any case, all of these times far exceed the likely existence of the Earth. So the year numbers should be considered approximate.