CAL(1) CAL(1)
NAME
cal - print calendar
SYNOPSIS
cal [ -s 1..7 ] [ month ] [ year ]
DESCRIPTION
Cal prints a calendar. Month is either a number from 1 to
12, a lower case month name, or a lower case three-letter
prefix of a month name. Year can be between 1 and 9999. If
either month or year is omitted, the current month or year
is used. If only one argument is given, and it is a number
larger than 12, a calendar for all twelve months of the
given year is produced; otherwise a calendar for just one
month is printed. The calendar produced follows the Calendar
(New Style) Act of 1750.
-s N makes cal display N, specified as a number between 1 to
7 (Monday to Sunday), as the first day of the week. The
default is Sunday.
Try
cal sep 1752
SOURCE
/sys/src/cmd/cal.c
BUGS
The year is always considered to start in January even
though this is historically naive.
Beware that `cal 90' refers to the early Christian era, not
the 20th century.