Rating Newest Oldest. Best Answer: With an average orbital speed of 9.69 km/s, it takes Saturn 10,759 Earth days (or about 29½ years), to finish one revolution around the Sun therefore making it one year. That answers how long a Saturn year is, 10,759 Earth days. Now to answer the question, How many days are in a year on Saturn, Saturn spins very fast on its axis. A Saturn day is roughly 10.5 hours, compared to 24 hours for an Earth day. Divide 24 by 10.5: 1 Earth day equals 2.286 Saturn days. Multiply 10,759 Earth days by 2.286. Therefore, on Saturn there are about 24,595 Saturn days and nights in one Saturn year.