What time is it again?
Bash

watch -tn.1 date +%T\|figlet


Yeah, yeah, I know it's not golf (28 bytes!), but I do like the minimalism:



watch is a tool provided by the procps package that repeatedly runs a command every &lt;specified interval of time> and outputs the updated results. (An example of where this is handy: watch -n.1 ls -lh ~/downloads/foo to view the progress of a download.)

The -t flag for watch represents --no-title, as otherwise it would look like this:



The -n 0.1 flag simply means "update every 0.1 seconds."

Then comes the command that we're watching over. First, date +%T prints the date in the desired format (date comes from coreutils):

       %T     time; same as %H:%M:%S


Then this is piped to figlet (unsurprisingly provided by the figlet package), which converts STDIN to ASCII art.

(|  |  _            _   _,            _|   _  
 |  | / \_|  |     /   / |  /|/|     / |  / \_
  \/|/\_/  \/|_/   \__/\/|_/ | |_/   \/|_/\_/ 
   (|                                         

             _/  _/                                      _/                
    _/_/_/  _/  _/        _/_/_/    _/_/    _/  _/_/  _/_/_/_/    _/_/_/   
 _/    _/  _/  _/      _/_/      _/    _/  _/_/        _/      _/_/        
_/    _/  _/  _/          _/_/  _/    _/  _/          _/          _/_/     
 _/_/_/  _/  _/      _/_/_/      _/_/    _/            _/_/  _/_/_/        


        _|                   |    |   |    _)                  
  _ \  |    __ \   _ \  _` | __|  __| __ \  | __ \   _` |  __| 
 (   | __|  |   |  __/ (   | |    |   | | | | |   | (   |\__ \ 
\___/ _|   _|  _|\___|\__,_|\__| \__|_| |_|_|_|  _|\__, |____/ 
                                                   |___/       
                       _                                
    o_|_|_  _|_|_  _  |_o _ | __|_ ._ .__  _ .__.._ _   
\/\/| |_| |  |_| |(/_ | |(_||(/_|_ |_)|(_)(_||(_|| | |o 
                          _|       |       _|