Display a calendar


   cal [-mjy] [[month] year]


     -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 4 digit year (1 – 9999) to be displayed.

Two parameters denote the Month (1 – 12) and Year (1 – 9999).

If arguments are not specified, the current month is displayed.

A year starts on 01 Jan.