.Dd 2015-10-08
.Dt CAL 1
.Os sbase
.Sh NAME
.Nm cal
.Nd show calendar
.Sh SYNOPSIS
.Nm
.Op Fl 1 | Fl 3 | Fl y | Fl n Ar num
.Op Fl s | Fl m | Fl f Ar num
.Op Fl c Ar num
.Oo Oo Ar month Oc Ar year Oc
.Sh DESCRIPTION
.Nm
writes a calendar of
.Ar month
and
.Ar year
or the current month to stdout.
If
.Ar year
is given without
.Ar month ,
.Nm
writes a 3-column calendar of the whole
year to stdout.
The date formatting is according to
.Xr localtime 3 .
.Pp
The Julian calendar is used until Sep 2, 1752.
The Gregorian calendar is used starting the next day on Sep 14, 1752.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl 1
Print current month.
This is the default.
.It Fl 3
Print previous, current and next month.
.It Fl c Ar num
Print
.Ar num
calendars in a row.
The default is 3.
.It Fl f Ar num
Set
.Ar num
(0 is Sunday, 6 is Saturday) as first day of week.
.It Fl m
Set Monday as first day of week.
.It Fl n Ar num
Output
.Ar num
months starting from and including the current month.
.It Fl s
Set Sunday as first day of week.
.It Fl y
Print the entire
.Ar year
or current year.
.El
.Sh SEE ALSO
.Xr localtime 3
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2013
specification.
.Pp
The flags
.Op Fl 13cfmnsy
are an extension to that specification.