cal
cal is a Linux command in the Date & Time category, rated intermediate difficulty. Displays a calendar in the terminal. The syntax is cal [options] [[month] year]. It returns calendar display. A practical example: cal cal 2026 # Full year calendar cal 12 2026 # December 2026 cal -3 # Prev, current, next month A close relative is date, which displays or sets the system date and time. A close relative is time, which measures the execution time of a command (real, user, sys). A close relative is sleep, which delays execution for a specified amount of time. More about this category: Linux date and time commands — date, cal, timedatectl, and more. View and set system date and time. Related Date & Time commands: date, time, sleep, crontab, at, hwclock, timedatectl, ntpdate. This page is part of the free Linux Reference documentation covering 304+ commands, each with syntax, options, practical examples, and a difficulty rating.