Edit pdf creation date mac

There are times particularly for photos when we have to replace batteries on our digital cameras and having the camera reset the date and time to some default time in the past. Digital cameras typically do not come with a real time clock built into it and would hold charge enough between battery changes but if you do take the batteries out to charge overnight or to have them taken out because you would not use the camera for several weeks, you will find that the file date get reseted.

So each time that happens, we will have to manually set the date and time all over again.


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Having taken a load of pictures and realise that the dates and or time are wrong can be frustrating. For normal files, we can use the command line function built into Windows or Mac to change them to a single date and time but that is probably not something which we want for photos when not all photos are taken at the same time. We can evoke the command line powershell function such as. The first line would change the creation time and the last two relates to the last access and last write times to a specific file date and time.

Changing Creation Date of Docs - Apple Community

The powershell has a more complex feature which allows you to add or subtract time from the existing date by using the AddYears, AddMonths, AddHours and AddMinutes function. This will let you do a sort of date maths to it. For instance, if you want to add a year and 4 days to your dates, you can do something like. All these are very powerful stuff.


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To do for more than a single file, you can probably create a batch file which will loop through all the files in that directory. On the Mac and Linux system, the -t will change the file creation date and the -mt will do so for the modification and last access date.

I have not found a way to do date maths on the existing file dates as yet.

So far all these does is change the file creation and modification dates but with photos particularly with cloud services such as Google Photos, it uses the EXIF Date and Time to sort the photos. There is however, ExifTool which is a command line app which supports that. She is especially interested in new photo and video habits, trends and tools that make our life easier and more fun.

Great post, thank you for sharing! I often find groups of photos that have NO Exif Date, only creation date and modified date, and the modified date is the correct date.

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The creation date is the date I copied the files from a client. Do you? Hi Sandra, great to hear that it was an interesting read for you!

Changing Date Created and Date Modified for Files in Windows

Regarding the photos without Exif date… Without knowing the context of which operating system and photo management softwares are in place on the client side and your side… The first thing that comes to my mind is that those photos might be downloaded from social media. For example Facebook strips out the Exif data when someone uploads a photo. And when you download, you will then only have creation and modification dates.

I also heard of Exif date loss when using some softwares and backup-sync systems. Then it helps to cross check this with an Exif reader. Hope these make sense for your case!

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"Touch" won't change file creation date -why?

There was an error submitting your subscription. Please try again. Email Address. February 19, By Selin Tagmat. About Selin Tagmat Selin Tagmat has a background in architecture and communication. New to Photo Organizing? Read Our Top 10 Posts for Beginners!

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September 10, Previous Post Next Post. Sandra Williams February 19, at pm Great post, thank you for sharing!

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Selin Tagmat February 20, at am Hi Sandra, great to hear that it was an interesting read for you! Caroline Guntur February 20, at pm Hi Sandra! All Rights Reserved.