Wanted to provide an update here.
First of all, if you are running into bugs (like all your photos have the same date) please reach out to support. If you’re on mobile, you can shake your device, if you’re on the web, you can use the settings cog.
As for the ability to change metadata on photos, that’s not something we currently have on the immediate roadmap.
An error occurred while saving the commentOliver commented
Apple's Photos app allows the ability to edit date and time (and other EXIF data) from within the app. Why does the Windows 10 app not allow this?
Really, Microsoft, you need to address this, urgently.