How to edit capture time +8 hours on multiple photos at once?

I missed to adjust the time on my camera when traveling between time zones, so now I got a large amount photos for which the time is 8 hours off. It matters particularly in albums where files from other cameras are also imported and I cannot sort things properly. I am using the cloud version of LR. Is there any way this can be accomplished? So far I have only been able to edit one photo at a time, which doesn't seem to be a smart way of doing it... I recall its quite easy to do that in Classic, but what about Cloud?