jcal

Jcal is a command line tool used for displaying a calendar on Unix-based systems. It is a simple and efficient tool that provides various options for customizing the calendar display. The basic syntax for using jcal is 'jcal [options] [month year]'. If no options are provided, it displays the calendar for the current month and year.

Jcal supports different options like 'y' to display the calendar for the entire year, 'f' to highlight the current day, 'e' to display the week starting from Monday, and 'j' to use Julian date format. Other options include 'm' to display a specific month, 'C' to show color-coded days, 's' to display Saturdays with bold, 'n' to hide the week's number, and 'c' to display fixed-width format.

By default, jcal uses the Gregorian calendar, and it can also be used to display calendars in other non-Gregorian calendars like Julian, Hebrew, and French Revolutionary calendars. It also supports displaying lunar phases using the '-M' option. The output of jcal can be piped to other commands or redirected to a file for further processing or storage.

Jcal is a lightweight and handy tool for quickly checking dates, planning events, or integrating calendar information into scripts or programs. Its simplicity and flexibility make it a useful utility for both casual and advanced users.