Usage

tty-clock [-iuvsScbtrahDBxn] [-C [0-7]] [-f format] [-d delay] [-a nsdelay] [-z scale] [-T tty]

-s	Show seconds
-S	Screensaver mode
-x	Show box
-c	Set the clock at the center of the terminal
-C [0-7]	Set the clock color
-b	Use bold colors
-t	Set the hour in 12h format
-u	Use UTC time
-T tty	Display the clock on the specified terminal
-r	Do rebound the clock
-f format	Set the date format
-n	Don't quit on keypress
-v	Show tty-clock version
-i	Show some info about tty-clock
-h	Show this page
-D	Hide date
-B	Enable blinking colon
-d delay	Set the delay between two redraws of the clock. Default 1s.
-a nsdelay	Additional delay between two redraws in nanoseconds. Default 0ns.
-z scale	Scale the clock UI (1-4). Default 1.

Credits

• Scale factor option (-z flag) by @author-handle, originally submitted as xorg62/tty-clock#120