IOS17 Standby Mode will only display Cupertino time on the main screen but subsequent screens display correct time.
I have gone to settings and made sure my time was set to automatic. I then went to the Clock widget and deleted all the clocks except Chicago as we are on Central time. Nothing works to change the main clock and I notice even this post, which I am writing in my iPad running IOS17 as well, is listing the time of the posting as Cupertino time. However, when I scroll through the clocks, the rest of them display the correct time. I think Apple is going to have to upload a fix unless someone has thought of the solution. This is mainly just an annoyance as it is not difficult to scroll and the rest of IOS 17 is wonderful. This is the only glitch I have found. Pretty darned good considering the size of this upgrade. Incredible job by the entire team.