PART I - THE HIDDEN PROBLEM
Why Mars Needs More Than a Clock

Mars already has clocks. It has sol counts, astronomical coordinates, mission timelines and extraordinarily precise ways of describing where the planet is and when an event occurs.

What it does not yet have is a civil calendar designed for a permanent human society.

That distinction is the starting point. A civilisation needs more than accurate timekeeping. It needs recurring structures for institutions, memory and ordinary life: weeks that return, annual positions people recognise, dates that can sit inside contracts and birthdays, and shared ways of talking about what happens next.

Mars makes this harder than it first appears. Its day is remarkably Earth-like. Its year is not. Familiar units therefore survive just well enough to become misleading.

Part I asks what a calendar actually does, which functions Earth's calendar quietly bundles together, and what a Martian civil system would need to preserve once those relationships come apart.