Install wmclock by entering the following commands in the terminal:
sudo apt update sudo apt install wmclock
Description:
dockable clock applet for Window Maker
wmclock is an applet for Window Maker which displays the date and time in a dockable tile. It features multiple language support, 24h or 12h time display, and can run a user-specified program on mouse click.
Homepage: http://windowmaker.org/dockapps/?name=wmclock
Version: 1.0.16-1build1
Section: universe/x11