For some reason, after I rebooted my clock switched from 12 hour format to 24 hour format.

I can't figure out why it did this, or how to change it back.

New to Litestep (again), I had tried it a long time ago but I had a lot of crashing. I figured I would give it a try again and so far everything has been great except for this.

At any rate, I tried searching the forums for "time" and "time format" as well as reading the stickies but I can't seem to find an answer.

Any help would be most appreciated.

Check the docs for whatever module is providing that time. Odds are pretty good that it would be xlabel, but it could also be label or lsxcommand depending on the theme.