Iphone 7 time and date disappeared and weather widget not refreshing after ios 11 update

It just happened to me as well, but on the lock screen the iPhone 8 :

No time or date just the wallpaper, so weird

Restarted and it 's working now but definitely is a bug of iOS 11 or iOS 11.0.2(i have updated just yesterday )

Please report it to Apple Feedback

I just did, more people report it more chances they fix it

Do

Restart / Force Restart

https://support.apple.com/en-us/HT201559

Same thing with me since iOS 10.3.x. on an iPhone 6S. Either they freeze along with the notifications getting jumbled and freezing or they disappear on both home and lock screens. Just recently upgraded to the iPhone 8 Plus and the same thing is happening but it is contained to the lock screen. Sometimes a restart doesn’t work and have to immediately try restart again. Factory restore doesn’t permanently clear it either. All you can do is keep restarting when they crop up until Apple hopefully sends a software fix.

One thing I also did, beside restarting, was to go to

Settings-General-Date & Time and switch the

Set Automatically (Time Zone )to off

Not sure it's linked but in case the system is working on deciding where you are , maybe this could affect the Time..?! 😕

It's little awkward but..still no other issues so far

Thanks for that. I just sent them comments. Hope this makes a difference