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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
+.TH "CAL" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" cal
+.SH NAME
+cal \- print a calendar
+.SH SYNOPSIS
+.LP
+\fBcal\fP \fB[[\fP\fImonth\fP\fB]\fP \fIyear\fP \fB]\fP\fB\fP
+.SH DESCRIPTION
+.LP
+The \fIcal\fP 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.
+.SH OPTIONS
+.LP
+None.
+.SH OPERANDS
+.LP
+The following operands shall be supported:
+.TP 7
+\fImonth\fP
+Specify the month to be displayed, represented as a decimal integer
+from 1 (January) to 12 (December). The default shall be the
+current month.
+.TP 7
+\fIyear\fP
+Specify the year for which the calendar is displayed, represented
+as a decimal integer from 1 to 9999. The default shall be the
+current year.
+.sp
+.SH STDIN
+.LP
+Not used.
+.SH INPUT FILES
+.LP
+None.
+.SH ENVIRONMENT VARIABLES
+.LP
+The following environment variables shall affect the execution of
+\fIcal\fP:
+.TP 7
+\fILANG\fP
+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.)
+.TP 7
+\fILC_ALL\fP
+If set to a non-empty string value, override the values of all the
+other internationalization variables.
+.TP 7
+\fILC_CTYPE\fP
+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).
+.TP 7
+\fILC_MESSAGES\fP
+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.
+.TP 7
+\fILC_TIME\fP
+Determine the format and contents of the calendar.
+.TP 7
+\fINLSPATH\fP
+Determine the location of message catalogs for the processing of \fILC_MESSAGES
+\&.\fP
+.TP 7
+\fITZ\fP
+Determine the timezone used to calculate the value of the current
+month.
+.sp
+.SH ASYNCHRONOUS EVENTS
+.LP
+Default.
+.SH STDOUT
+.LP
+The standard output shall be used to display the calendar, in an unspecified
+format.
+.SH STDERR
+.LP
+The standard error shall be used only for diagnostic messages.
+.SH OUTPUT FILES
+.LP
+None.
+.SH EXTENDED DESCRIPTION
+.LP
+None.
+.SH EXIT STATUS
+.LP
+The following exit values shall be returned:
+.TP 7
+\ 0
+Successful completion.
+.TP 7
+>0
+An error occurred.
+.sp
+.SH CONSEQUENCES OF ERRORS
+.LP
+Default.
+.LP
+\fIThe following sections are informative.\fP
+.SH APPLICATION USAGE
+.LP
+Note that:
+.sp
+.RS
+.nf
+
+\fBcal 83
+\fP
+.fi
+.RE
+.LP
+refers to A.D. 83, not 1983.
+.SH EXAMPLES
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+A future version of IEEE\ Std\ 1003.1-2001 may support locale-specific
+recognition of the date of adoption of the
+Gregorian calendar.
+.SH SEE ALSO
+.LP
+None.
+.SH 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 .