MediaWiki:Exif-datetime/qqq

Exif is a format for storing metadata in image files. See this Wikipedia article and the example at the bottom of. The tags are explained briefly and in further detail.

Note, this message is also used for the XMP:ModifyDate property in XMP metadata. See page 35 of http://www.adobe.com/content/dam/Adobe/en/devnet/xmp/pdfs/XMPSpecificationPart1.pdf

Datetime is the time that the digital file was last changed.