It seems there were a few people who stumbled upon my blog looking to fix the KDE 4 clock to display time in a 12-hour format. I felt guilty, because I didn’t actually provide any real information on the subject in the post that led them here. It’s easy, but a little counterintuitive, so here’s a step by step of how to do it:
Open up the KDE 4 System Settings, and click on the “Regional & Language” icon. Then, click on the “Time & Dates” tab, and change the time format from “HH:MM:SS” to “pH:MM:SS AMPM”. You’ll probably need to restart the desktop.
That’s it. Hopefully, the KDE team will do something soon to make doing this more intuitive.