The cal utility writes a Gregorian calendar to standard output. If the year operand is specified, a calendar for that year is written. If no operands are specified, a calendar for the current month is written.

The following operands are supported:

month

Specify the month to be displayed, represented as a decimal integer from 1 (January) to 12 (December). The default is the current month.

year

Specify the year for which the calendar is displayed, represented as a decimal integer from 1 to 9999. The default is the current year.

See environ(5) for descriptions of the following environment variables that affect the execution of cal: LC_TIME, LC_MESSAGES, and NLSPATH.

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

See attributes(5) for descriptions of the following attributes:

calendar(1), attributes(5), environ(5)

An unusual calendar is printed for September 1752. That is the month 11 days were skipped to make up for lack of leap year adjustments. To see this calendar, type:

cal 9 1752

The command cal 83 refers to the year 83, not 1983.

The year is always considered to start in January.