I run a simple system with X and fvwm (ie no gnome or KDE) and I had a need for a digital clock to be displayed and continuously (every second) updated. I found xclock which seemed to promise sufficient capabilites but I cannot get a digital 24hr clock.

I tried "xclock -d -update 1 -twentyfour" but it showed me that it was 05:57 PM BST when I wanted 17:57. I tried various parameters but it did not do what the man page says.

I would be happier with a clearer display but why no 24hr clock?