Hi,
I'm new to the forum and iPhone as well. I found an app called ExifWizard that will allow u to view a date/time stamp for your photos while still on your iPhone. It's free but there is also a pay version. I got the free and it works u just have to have your geotagging turned on. To use it u open the ExifWizard app and view ur photos thru it. It asks a bunch of questions the first time u use it but it looks to be pretty self explanatory.