A year is 365.2425 days long. This is rounded down to 365 except every 4 years where it is 366 except every 100 years where it is missed out (365 days) except every 400 years where the missing out is missed out (366 days)
365.2422 days
365.2422 days
365.2422 days
365.2422 days
365.2422 days
The time taken for the earth to spin once on it's axis.
29.5 Earth years.
Saturn's "year" is usually defined as the time it takes to orbit the Sun. That is about 29.4 Earth years.
687 (Earth) days. (Not quite 2 Earth years.)
84 earth years
164.79 years
8 Earth Years 8 Earth Years 8 Earth Years
The time taken by Callisto to orbit the Sun is essentially the same as the length of Jupiter's year: 11.86 earth years.
"Lights" is not a unit of time. If you mean "light-years", that's not a unit of time, either; it is a unit of length.
687 (Earth) days. (Not quite 2 Earth years.)
686.98 Earth days or 1.88 Earth years.
Mars, with a orbital period of around 687 days, almost two Earth years (1.88 earth years).