CAL(1) General Commands Manual CAL(1)
cal - display a calendar
cal [ [ month ] year ]
cal displays a calendar for the specified year. If a month is also
specified, a calendar for that month only is displayed. If neither is
specified, a calendar for the present month is printed.
year can be between 1 and 9999. Be aware that `cal 78' refers to the
early Christian era, not the 20th century. Also, the year is always
considered to start in January, even though this is historically naive.
month is a number between 1 and 12.
The calendar produced is that for England and her colonies.
Try September 1752.
9 September 1987 CAL(1)