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

PROLOG

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

NAME

       cal - print a calendar

SYNOPSIS

       cal [[month] year ]

DESCRIPTION

       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.

OPTIONS

       None.

OPERANDS

       The following operands shall be supported:

       month  Specify the month to be displayed, represented as a decimal integer from 1 (January) to 12 (December). The default shall be the cur-
	      rent month.

       year   Specify the year for which the calendar is displayed, represented as a decimal integer from 1 to 9999. The default shall be the cur-
	      rent year.

STDIN

       Not used.

INPUT FILES

       None.

ENVIRONMENT VARIABLES

       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
	      IEEE Std 1003.1-2001,  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

       Default.

STDOUT

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

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       None.

EXTENDED DESCRIPTION

       None.

EXIT STATUS

       The following exit values shall be returned:

	0     Successful completion.

       >0     An error occurred.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       Note that:

	      cal 83

       refers to A.D. 83, not 1983.

EXAMPLES

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       A future version of IEEE Std 1003.1-2001 may support locale-specific recognition of the date of adoption of the Gregorian calendar.

SEE ALSO

       None.

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								   CAL(1P)