The timestamp for some pictures and videos keeps changing?

[AC Question]

Hi, I have a Samsung S7 currently on Android 6.0.1. I save all media to my SD card (if it saves to the phones storage I just move it over). I noticed today that the pictures and videos I took at an event on the 24th of September have had their time stamp change to the 10th of October even thought I have made no modifications to them. This has also happened with images from August and July, any reasoning for this?

 

[Tim1954]

As far as the device is concerned, it received /modified the files on that date, so it will timestamp that to the file. It's annoying....

 

[Rukbat]

Moving the files is modifying them, so the modified data (which is what you see) will change every time you move them.

 

[ManiacJoe]

If you have any apps or services that will update the metadata or album art, these can change the timestamps.