cal is a classic Unix utility, available since the earliest versions of Unix. It can be used to display the calendar of one or more months at the shell. Its output format has remained the same since its introduction so you can also parse and use it in your scripts.
- By default, the command displays the calendar for the current month with today’s day highlighted in it. The month, year and days of the week are also displayed. These two commands are equivalent:
$ cal
$ cal -1
- To display previous, current and next month:
$ cal -3
- To display calendar for the current year:
$ cal -y
- To display calendar for a particular year in the past or future:
$ cal 1947
- To display calendar for a particular month in the past or future:
$ cal 8 1947
Tried with: Ubuntu 18.04