Mass: 6.4185×1023 kg (0.107 Earths)
Diameter: 6779 km (53% of Earth’s diameter)
Gravity: 3.711 m/s² (0.376 g)
Day length: 24h 37min
Month length: 27-28 days
Moon cycles: Phobos; 7h, Deimos; 30h)
Year length: 669 days (95.5 weeks)
Spring 194 days, summer 178d, Autumn 142d, Winter 154d (northern hem.)
Spring 28 weeks, summer 25w, Autumn 20w, Winter 21w (northern hem.)
Moons: Phobos (d = 22 km) an Deimos (d = 12 km)

Mars has seasons similar to those of the Earth, but longer.
The seasons on Mars last about twice as long as those on Earth.
However, the length of each season is not exactly the same since Mars has a slightly more elliptical orbit around the sun than does Earth.
Spring in the northern hemisphere (autumn in the southern) is the longest season at 194 days. Autumn in the northern hemisphere (spring in the southern) is the shortest at 142 days. Northern winter/southern summer is 154 days and northern summer/southern winter is 178 days.
Months of the year are, in order:
Spring; March, Dhanus, April, Makara, May, Kumbha, June,
Summer; Mina, July, Mesha, August, Rishabha, September,
Autumn; Mithuna, October, Karka, November, Simha,
Winter; December, Kanya, January, Tula, February, Vrishika.
That brings a Martian year to 668 Sols (or about 687 Earth days, about twice as long as an Earth year). A year, of course, is the time it takes for a planet to orbit once around the sun.

In many ways, the Martian wilds are much like Antarctica on Earth, and while genetic modification makes the experience much more bearable, people braving the wilds should plan their steps like for an expedition.

Smaller settlements housing biomorphs usually grow their own vegetables in hydroponics stations and use homegrown mealworms for a source of fat and protein


Eclipse Phase - Keywords Edition AreThoseMyPants