I shot loads of photos in EU. When I got home Apple Photos switched date and time to local time. Same thing for my cycling and running events. This is very confusing and plain wrong to reverse, say, a photo recorded at noon and show time as 9pm on another date
iPhone 13, iOS 26
As Matti said, traveling through Time Zones generates a conundrum, and there's no way for a computer to know what you want. When I lived in London, and our daughter lived in Texas, and we mixed those pictures up, we had to decide if we wanted noon to mean when the sun was overhead or when the sun was overhead for us. The answer is not obvious or the same for different uses.
If you collect all the pictures that are off by 9 hours (easy if they're in the same album,) select them, open Info and Adjust, you see the date and time for the first picture. If you fix that one, all the rest will be changed by the same amount -- not to the same time. Again, as Matti said, this is by far the easiest way to deal with this.
If you have a Mac, then gather all the similar times is pretty easy with a Smart Album.
Time zones are a pain. Some images might have no time zone info so they might revert to UTC time while others might have a more fixed offset metadata or similar GPS metadata that defines the time zone. Movies use their own related metadata, some of which use local time and some UTC.
If you'd rather not do some sleuthing, the easiest way to fix that is to adjust the times & time zones in Photos date panel.
Hmmm I wrote a response, but it didn’t publish… the discussions app said I was logged in because my reply took too long. Message was session expired. Weird. Trying again… my photos were shot in UTC+2 and I went through all of the, and adjusted the time zone to just that. And, my Apple Watch events have been converted to pacific time too. . If something happens at noon, whether a photo or exercise event, I happens and not 9 hours earlier. Period.
[Edited by Moderator]
Why are my events in EU changed to my home time after I get home
