Lightroom: Time zone adjust fails to allow for non-integral hour shifts

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Several countries are on half hour time zones (India, Iran, ...) and at least one on the quarter hour (Nepal). Lightroom's timezone adjust dialog allows for only whole hour shifts.

This makes it virtually impossible to merge image files in the correct time order from iPhones (on the local time) and the Nikon SLRs which I keep on GMT (to avoid this issue). 

I consider this a bug as it does not allow for a common (there are over a billion people in these time zones !!) use of this existing feature.
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Thomas Nash

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Posted 2 years ago

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Dan Hartford

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Turns out another bug may be what you need - as odd as that may sound.  If you select a bunch of images and use the "Set to specific time" option the system does the following.  First it sets the first image in your selection  to the date/time you specified but holds in memory the difference between the oriiginal date/time of that image and the new date/time of that image.  Then for each subsequent selected image it adds that delta to the existing date/time on the image to arrive at the new date/time for tat image.   

To me, this is a bug.  If I put a date/time in a box with the option"Set to specific date/time" selected, I expect all images to get that date/time. However for you this may be what you need.  Let's say you have 3 images that all must be reset to 15 minutes later than the camera supplied date/time.  Select them all, select "Set to specific date/time" and key in a date/time that is 15 minutes later than the date/time on the first image.  15 minutes will be added to each image.

Give it a try.  Hope that helps

Dan
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Thomas Nash

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Amazing. That solves the issue for me, but it is certainly not intuitive and I will have to struggle to remember it next time around.  Adobe needs to fix this dialog box.

Ideally the image metadata should be carrying the time zone. iOS does this properly for Apple (who keeps track of all the esoteric time zones and when they go to summer/winter time). Nikon cameras also allow setting the time zone at some level and can set to GPS time if you have a GPS running on camera. None of this time zone information seems to get into the image metadata as far as I can tell.

Long ago I started setting my cameras to GMT to avoid the constant confusion as I do a lot of overseas photography.

Thanks for the tip.
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John R. Ellis, Champion

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"If I put a date/time in a box with the option"Set to specific date/time" selected, I expect all images to get that date/time."

LR is missing that capability, which is especially important for the minority of users using LR to manage scans.   Please add your vote to this feature request: https://feedback.photoshop.com/photoshop_family/topics/option_to_assign_the_same_date_time_to_multip...
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John R. Ellis, Champion

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Adobe has tried to provide an explanation of what the Edit Capture Time's Adjust option does, though many still find it confusing:
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John R. Ellis, Champion

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"Ideally the image metadata should be carrying the time zone. iOS does this properly for Apple (who keeps track of all the esoteric time zones and when they go to summer/winter time). Nikon cameras also allow setting the time zone at some level and can set to GPS time if you have a GPS running on camera. None of this time zone information seems to get into the image metadata as far as I can tell."

The photo industry is a mess with respect to time zones.  It may be apocryphal, but someone asked a person working on the EXIF standard why it didn't allow time zone to be included in the capture date, and the standards person just looked blankly and said, "Why would you want that in a camera?"

There is a non-standard EXIF tag that some cameras insert to record time zone, but it only allows offsets in units of whole hours (of course -- who cares about 2 billion people in non-hourly zones?).  

Luckily, the newer XMP standard does allow  specification of time zone, and some cameras do write XMP sections to their metadata (typically to record in-camera ratings).  I haven't personally seen a camera record the time zone in XMP yet, but some may well.

But photo software generally ignores time zones in the metadata.  It took several versions for LR to get a reasonable approach -- it just ignores any time zones that are in the metadata and displays all times as "local".  Given the industry mess, this is probably as good a solution as any.

Quicktime has also made a complete mess of time zones and video capture dates as well.  But that's another flame...
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Bob Trlin

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" ...who cares about 2 billion people in non-hourly zones?)."
Trump voters who represent just 2.2% of the world's population sure as hell don't care but Adobe should.
(Edited)
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Alan Harper

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John, the quote you are looking for is

Let me rant for the moment and say that The EXIF standard for photographic metadata is MORONIC. It has all kinds of fields for image-related date/time pairs, but absolutely no provision to encode what timezone those date/time pairs have been expressed in. A few years ago, I asked a member of the committee who created this standard why there was no provision for timezones, to which he essentially replied “why would anyone need timezones?” (He actually replied, in much better English than the Japanese with which I asked, “We would appreciate if we could have more information about in what case did you feel inconveniency for the lack of time zone information and for what purpose do you utilize the time zone code.”). Arrrrggggh, if you have to ask.... (sigh).

Jeffrey Friedl at http://regex.info/blog/lightroom-goodies/gps
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John R. Ellis, Champion

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Thanks. :-<
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Alex Hawthorn

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This reply was created from a merged topic originally titled Lightroom: Timezone support for :30 minute time changes, please.

Time Zone Support in Lightroom: It's easy to batch adjust capture time by the hour for time zone support, but I just shot a few thousand photos in India, which is 9.5 hours ahead of EDT. It would be useful to see timezone support in the Photoshop family down to the :15 minute increment!
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Hans Christian Rosenkold

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This reply was created from a merged topic originally titled Lightroom: How do change the Timezone when difference is non integer e.g. 4.5 hou....

I have a problem with Lightroom CC on changing timezone in photo metadata when difference is not an integer number. Example is Sri Lanka, which is 5.5 hours ahead of UTC. Options are currently only integer numbers. Will you do an update on this?
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Dan Hartford

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For how to do non integer time zone adjustments, see my reply earlier in this thread.
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PhotoCoq

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Great thread. I came here because my two camera clocks keep on showing time differences and I use them a lot almost at the same time. Obtaining a proper photo sequence based on date and time becomes a nightmare, Now solved as I did not understand this menu item until now. My suggestion would be to change to menu item from 'Adjust to a specified date and time' to 'Shift by a specified time difference'.