Display a calendar

      cal [-mjy] [month [year]]

     Cal displays a simple calendar.  If arguments are not specified, the cur­
     rent month is displayed.  The options are as follows:

     -m      Display monday as the first day of the week.

     -j      Display julian dates (days one-based, numbered from January 1).

     -y      Display a calendar for the current year.

     A single parameter specifies the year (1 - 9999) to be displayed; note
     the year must be fully specified: ``cal 89'' will not display a calendar
     for 1989.  Two parameters denote the month (1 - 12) and year.  If no pa­
     rameters are specified, the current month's calendar is displayed.

     A year starts on Jan 1.

     The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd
     of September.  By this time, most countries had recognized the reforma­
     tion (although a few did not recognize it until the early 1900's.)  Ten
     days following that date were eliminated by the reformation, so the cal­
     endar for that month is a bit unusual.

     A cal command appeared in Version 6 AT&T UNIX.

Related commands:

dc - Desk Calculator
factor - Print prime factors
units - Convert units from one scale to another
wc - Print byte, word, and line counts

Equivalent Windows NT commands:

none, although the SET /A command does allow basic arithmetic.

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Simon Sheppard