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View calenders in Terminal using built-in commands

David Carr

Tools

    This tweet introduces how to show a calendar in a terminal, very neat!

    [tweet https://twitter.com/mgechev/status/1289085957292130304]

    After this, I started thinking about what other calendar views are there.

    When in the terminal, you can see a small calendar by typing:

    cal
    

    This then shows you a calendar:

    cal.png

    Other options:

    • -1 Display single month output. (This is the default.)
    • -3 Display prev/current/next month output.
    • -s Display Sunday as the first day of the week.
    • -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.
    • -V Display version information and exit.

    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. Three parameters denote the day (1-31), month and year, and the day will be highlighted if the calendar is displayed on a terminal. If no parameters are specified, the current month’s calendar is displayed.

    A year starts on Jan 1. The first day of the week is determined by the locale. The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of September. By this time, most countries had recognized the reformation (although a few did not recognize it until the early 1900s.) Ten days following that date were eliminated by the reformation, so the calendar for that month is a bit unusual.

    Also, you can change the view by using

    ncal
    

    ncal.png

    To see the previous, current and next month use:

    cal -3
    

    cal-3.png

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