cal - print a calendar
cal [month] year
cal 3 1992 # Print March 1992
Cal prints a calendar for a month or year. The year can be
between 1 and 9999. Note that the year 91 is not a synonym
for 1991, but is itself a valid year about 19 centuries ago.
The calendar produced is the one used by England and her
colonies. Try Sept. 1752, Feb 1900, and Feb 2000. If you
do not understand what is going on, look up Calendar, Gre-
gorian in a good encyclopedia.