worldclock is a World Clock for a module.
See Mods Admin for instructions on how to install a Mod.
Once installed, you will see it under "Admin > Modules" (tiki-admin_modules.php):
The assigned module looks like this:
By default it shows your local time. but you can change it to the time of any country from the drop down list (shifted to Argentina time two minutes after the previous image was taken):
See also the Mod clock, which is much smaller.
- Mod clock - another clock module