Alright, so I did what you told me to do and I noticed that it is already in the 24 hour time format. However, it does not show the AM/PM tabs.
My hardware version on the router is "B1" and my firmware version "2.02." I live in the U.S. in California.
I re-checked the User Manual and when you look at the "Schedule" section there is a picture. It doesn't show an AM/PM time frame either... I suppose that there is a way but I do not know how to do it, : /