PROLOG | NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | STDIN | INPUT FILES | ENVIRONMENT VARIABLES | ASYNCHRONOUS EVENTS | STDOUT | STDERR | OUTPUT FILES | EXTENDED DESCRIPTION | EXIT STATUS | CONSEQUENCES OF ERRORS | APPLICATION USAGE | EXAMPLES | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

CAL(1P)                   POSIX Programmer's Manual                  CAL(1P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       cal — print a calendar

SYNOPSIS         top

       cal [[month] year]

DESCRIPTION         top

       The cal utility shall write a calendar to standard output using the
       Julian calendar for dates from January 1, 1 through September 2, 1752
       and the Gregorian calendar for dates from September 14, 1752 through
       December 31, 9999 as though the Gregorian calendar had been adopted
       on September 14, 1752.

       If no operands are given, cal shall produce a one-month calendar for
       the current month in the current year. If only the year operand is
       given, cal shall produce a calendar for all twelve months in the
       given calendar year. If both month and year operands are given, cal
       shall produce a one-month calendar for the given month in the given
       year.

OPTIONS         top

       None.

OPERANDS         top

       The following operands shall be supported:

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

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

STDIN         top

       Not used.

INPUT FILES         top

       None.

ENVIRONMENT VARIABLES         top

       The following environment variables shall affect the execution of
       cal:

       LANG      Provide a default value for the internationalization
                 variables that are unset or null. (See the Base Definitions
                 volume of POSIX.1‐2008, Section 8.2, Internationalization
                 Variables for the precedence of internationalization
                 variables used to determine the values of locale
                 categories.)

       LC_ALL    If set to a non-empty string value, override the values of
                 all the other internationalization variables.

       LC_CTYPE  Determine the locale for the interpretation of sequences of
                 bytes of text data as characters (for example, single-byte
                 as opposed to multi-byte characters in arguments).

       LC_MESSAGES
                 Determine the locale that should be used to affect the
                 format and contents of diagnostic messages written to
                 standard error, and informative messages written to
                 standard output.

       LC_TIME   Determine the format and contents of the calendar.

       NLSPATH   Determine the location of message catalogs for the
                 processing of LC_MESSAGES.

       TZ        Determine the timezone used to calculate the value of the
                 current month.

ASYNCHRONOUS EVENTS         top

       Default.

STDOUT         top

       The standard output shall be used to display the calendar, in an
       unspecified format.

STDERR         top

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES         top

       None.

EXTENDED DESCRIPTION         top

       None.

EXIT STATUS         top

       The following exit values shall be returned:

        0    Successful completion.

       >0    An error occurred.

CONSEQUENCES OF ERRORS         top

       Default.

       The following sections are informative.

APPLICATION USAGE         top

       Note that:

           cal 83

       refers to A.D. 83, not 1983.

EXAMPLES         top

       None.

RATIONALE         top

       Earlier versions of this standard incorrectly required that the
       command:

           cal 2000

       write a one-month calendar for the current calendar month (no matter
       what the current year is) in the year 2000 to standard output. This
       did not match historic practice in any known version of the cal
       utility. The description has been updated to match historic practice.
       When only the year operand is given, cal writes a twelve-month
       calendar for the specified year.

FUTURE DIRECTIONS         top

       A future version of this standard may support locale-specific
       recognition of the date of adoption of the Gregorian calendar.

SEE ALSO         top

       The Base Definitions volume of POSIX.1‐2008, Chapter 8, Environment
       Variables

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                             CAL(1P)