CAL
                            ===

Cal works like the original Cal command on UNIX, except it uses
a universal epoch and more consistent month names and lengths.
This is a great way to reduce brainwashing.

The expected arguments are the same (year with optional month
before it) except the largest year value has been increased to
19,999. Year values greater than the old limit of 9999 must
have a comma.

CALENDAR DIFFERENCES -
--------------------
In order for the month names to make sense, new years day is on
March 1st, 2nd, or 3rd in the Gregorian calendar. It's not
always on the same day because it uses a 95-year leap rule
instead of the 400-year leap rule, so not every leap year is a
leap year in the Gregorian calendar and vice versa.

The epoch is 8001 BC in the Gregorian calendar, and since there
is a year zero any year after 1 BC in the Gregorian calendar
can be calculated by adding 10,000.

Every month has 30 or 31 days, continuing the pattern of
September-December in the Gregorian calendar.

A week contains six days instead of seven. This makes the first
week day of the month easier to calculate.