Modified Dates On Folders and Parent Folders (6/94)

I want to be able to change a folder that is nested in several other folders and have the modified date for all the enclosing folders change. Sometimes the modified date changes for enclosing folders and sometimes it doesn't. Could you briefly explain the way a Macintosh updates the modification dates for folders?

Modification dates are not propagated up the directory tree. Modification dates are only changed when something in the folder actually changes and not something in its sub-folders. In other words, it is possible to have a folder that has a newer modification date than its parent. For example, the modification date on my hard drive is 6/20/94 8:33 AM but the modification date for the system folder is 6/20/94 11:37 AM.

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Published Date: Feb 19, 2012