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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	 corresponding
       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 current month.

       year   Specify the year for which the  calendar	is  displayed,	repre‐
	      sented as a decimal integer from 1 to 9999. The default shall be
	      the current 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	 Vari‐
	      ables  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  cur‐
	      rent 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 Technology
       --  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)
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