EXIF, which stands for Exchangeable Image File Format, usually refers to a set of additional data items associated with photographs. It usually stores fields such as the name of the camera used to take the picture, when it was taken, what were the settings of the lens and the camera sensor when the picture was taken, and so on.

When determining the date for the file, DateMeNow first tries to find this information, and extract the date from it. If no EXIF information is present in the file, DateMeNow will take the date when the file was last modified (which often coincides, or is very close to, the actual date when the picture was taken if it came from a digital camera), and use that date instead.

What is EXIF?