As Mars orbits the Sun, it completes one rotation every 24.6 hours, which is very similar to one day on Earth (23.9 hours). Martian days are called sols – short for "solar day." A year on Mars lasts 669.6 sols, which is the same as 687 Earth days.
“She wants to struggle, feeling total loss of control. To gasp as she feels the fear grip her chest tightly, but also feels her body react and betray her.” - AussiePrimal