ncal

This command is an alias of cal with vertical calendar layout.
Display current month calendar

$ ncal

$ ncal [month] [year]

$ ncal -y [year]

ncal [-y] [-3] [-1] [-A months] [-B months] [[month] year]

ncal displays a calendar in a vertical format where weeks run down the screen. It is an alternative interface to the cal command, which displays calendars horizontally.
The vertical format is useful for terminals with limited width or when comparing dates across weeks. Both ncal and cal are typically provided by the same package on most systems.

cal(1)