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Display calendars with the shell command cal
cal can be used to display calendars in a shell. With no arguments, it shows the current month.
Show a specific month
Show the calendar for April 2018:
$ cal 2018 -m 4
2018-08-25: Apparently, this is not true for all versions of cal. Other versions seem to require month and year as arguments:
$ cal 4 2018
Show current and next two months
$ cal -A 2
Similarly, -B n can be used to show the preceding n months.
2018-08-25: Apparently, this is not true for all versions of cal. Other versions seem to require -n 4 to display current and following three months.
Show 5 months after a specific month
To print the months from November 2018 through March 2019, cal needs to be given the starting month and count of months:
$ cal 11 2018 -n 5
Show 5 months around a specific month
-S allows to indicate a month and a year around which the month-calendars should be printed.
The following command prints the calendar for November 2018.
$ cal -S 11 2018
If combined with -n 5, it prints the 5 months «around» November 2018, that is Septemper 2018 trhough January 2019.
$ cal -S 11 2018 -n 5
Show previous, current and next month
When executed on the December 13, 2017, cal -3 will print
$ cal -3
November 2017 Dezember 2017 Januar 2018
So Mo Di Mi Do Fr Sa So Mo Di Mi Do Fr Sa So Mo Di Mi Do Fr Sa
1 2 3 4 1 2 1 2 3 4 5 6
5 6 7 8 9 10 11 3 4 5 6 7 8 9 7 8 9 10 11 12 13
12 13 14 15 16 17 18 10 11 12 13 14 15 16 14 15 16 17 18 19 20
19 20 21 22 23 24 25 17 18 19 20 21 22 23 21 22 23 24 25 26 27
26 27 28 29 30 24 25 26 27 28 29 30 28 29 30 31
31