Post Settlement
The timeline on Mars; the abbreviation is set before years like AC* and AD; started AC 70 December 25
Sol (plural: sols)
A Martian day, equivalent to 24 hours, 39 minutes, 35.244 seconds on Earth
Rev (plural: revs)
A Martian year, 668.5991 sols or 686.98 days
Harmonia
A planetary-mass object roughly the size of Ceres that was captured and placed in orbit around Mars to stabilize its axial tilt and to give the Martians a similar experience to the Earth's Moon; tidally locked with an orbit roughly 12.8 sols.
Tosol
The current sol, equivalent to today on Earth
See also: sol
Yestersol
The previous sol, equivalent to yesterday on Earth
See also: sol
* AC 1 January 1 = AD 2201 January 1