I finally got the "AM/PM" on my lock screen. All I did was first, turn off automatic time update and then I was able to change the time info from "Houston" to "Chicago" like my time zone support in mail,calendars was set to Chicago. I then turned auto time back on, turned on 24 hour time and did a hard reset. I then put am/pm back on after the reset and it's there now. Kinda like it. Weird though, how the extra time zone support is hidden behind the auto time set....
Mine is doing the same thing. So if I want it back, I have to go through the whole reboot in 24hr mode thing to get it back. I'm not going to do a clean install of the software if I don't have to and its a PITA to do the goofy reboot, so I might just live without it.
And to those who wonder why I'd need it. I work midnights and sleep durring the day and my room is pitch black durring the day, so it's nice to see the "am" if I wake up at 10am and not wonder if I overslept and it's 10pm.
Lol I've had that confusion maybe three times in my life - and alcohol was always involved.
I couldn't care less about the AM/PM thing either really, but Apples implementation of it, as is becoming common, was not even half-assed: It only appeared on most phones (mine) if you went through the repeated toggle/reboot process, and then disappeared (on mine) all on it's own after a day.