Timezone, different cameras

[ciorius]

Hi,

I'm new to exiftool and I'm trying to use it to organize the pictures taken during summer. I have photos coming from different sources (several phones, a Nikon d5100 in JPG and a GoPro). I have managed to shift time for the DateTime Original but I wasn't able to set a common timezone for all the photos. In particular GoPro pictures seem to not have any timezone tag, Nikon has one but it doesn't allow the modification using a similar syntax to this https://exiftool.org/forum/index.php?topic=6054.0

Is there a way to solve this?

[Phil Harvey]

You can shift the Nikon TimeZone by specifying a number of minutes to shift:

exiftool -nikon:timezone+=60 FILE

Unfortunately the EXIF specification does not include time zone support.

XMP does, but I don't know if adding XMP tags to your files is a solution for you.

- Phil

[ciorius]

This line works for Nikon JPGs but not for GoPros. I think that I need to create the XMP tag for this last one series

[Alan Clifford]

Your Nikon files may have a daylightsavings tag as well

exiftool ahc_7991.nef -timezone -daylightsavings

Code Select Expand

Time Zone                       : +01:00
Daylight Savings                : Yes

[ciorius]

Thanks,

I have managed to modify the timezone, but at the moment it's useless because I'm trying to upload on Google Photos as a secondary backup and to share but it uses the local pc timezone instead of the timezone in the nikon tag or in GPS Date/Time.

[Alan Clifford]

Six years ago, I added this comment to one of my photographs on Flickr,
The BST time zone applied by Flickr is incorrect. The timeszone used for datetimeoriginal and gpstimestamp is UTC."

I think you are in for a very frustrating time dealing with timezones and third party websites as your experience shows that nothing has changed.