Last modified date and time is an attribute of file or folder that indicates on the file systems level when the file or folder was modified last time. When the files contents are modified and saved, last modified date and time stamp is set to correspond with the time of changes done. The purpose of this attribute is to show when the last changes of file or folder were done.
Like all file attributes last modified date and time is recorded in file system in addition to file, not in the file contents. This file systems level date and time file property does not interfere with the time and date stamps that are stored in the file itself. Various programs put their own date and time records in the file contents or meta-tags like Microsoft Office products and other software. Virtually there might be a file format which at the file content level presupposes infinite number of file dates and times fixed, yet there is only one last modified date and time attribute at the file systems level per file.
Any work with documents, images and other files automatically alters modification time stamp of the file. However in some cases it might be essential to revert files last modification date and time back to particular date and time (e.g. for sorting, recording, logging or other purposes).
With febooti fileTweak it is possible to change last modified date and time stamp of a file, folder or even group of files and / or folders on the file systems level with a single click. Modification of file date property does not changes files contents or interfere with files implicit time / date meta-tags.