marsCalendar Files

This is an implementation of the Darian Mars Calendar. The Darian calendar
begins on 1609-03-1 18:40:34 UTC in the Gregorian Calendar. This is called
the Telescopic epoch, because it is the first mars vernal (spring) equinox
to occur before the first observations by telescope of Mars. This was chosen
so that all observations from that point can be expressed in the calendar
with positive dates.

The calendar is a 24 month perpetual calendar. Each year begins on the first
day of spring (vernal equinox) in the northern hemisphere. Leap years happen
on odd number years, and years evenly divisible by 10 and 500, but not by
100. Each month has 28 days, except for the last month of each quarter
(6, 12, 18, 24), which have 27 each. (The last month has 28 on leap years.)
The 27 day months skip the last weekday so that each month begins on Solis,
and any day of the month is on the same weekday every month.

The month names are based on the 12 constellations, but since there are 24
months each one is used twice, first with its Latin name, then with its
Sanskrit name. The names of the weekdays are from the original Latin. Various
methods of noting the time of day have been used with this and other calendars.
Here I opt for a straight-forward decimal time, to five decimal places, shown
below the Today date. This is the current time at Mars’ prime meridian
(defined by the location of the crater Airy-0).