Unix doesn't keep track of a creation date. The only information that's available is typically the last times the files was:

1. Accessed
1. Modified
1. Changed

You can get dates related to a particular file using the `stat` command.

### Example

    $ stat ffmpeg 
      File: `ffmpeg'
      Size: 19579304  	Blocks: 38248      IO Block: 4096   regular file
    Device: fd02h/64770d	Inode: 10356770    Links: 1
    Access: (0755/-rwxr-xr-x)  Uid: (  500/    saml)   Gid: (  501/    saml)
    Access: 2013-11-26 10:49:09.908261694 -0500
    Modify: 2013-11-02 17:05:13.357573854 -0400
    Change: 2013-11-02 17:05:13.357573854 -0400

### OSX and HFS
If you're using OSX the filesystem that's used under that Unix is [HFS][1]. This is one of the few (that I'm aware of) that keeps the creation date within the filesystem, along with modification time etc. similar to other Unixes.

*excerpt*

> A File Record stores a variety of metadata about the file including its CNID, the size of the file, three timestamps (when the file was created, last modified, last backed up), the first file extents of the data and resource forks and pointers to the file's first data and resource extent records in the Extent Overflow File. The File Record also stores two 16 byte fields that are used by the Finder to store attributes about the file including things like its creator code, type code, the window the file should appear in and its location within the window.

### Timestamps
Time stamps are always maintained in the filesystem, so you're limited by whatever time tracking is offered by through them (EXT3, EXT4, XFS, etc.).

### Filesystems
If you're ever curious take a look at this Wikipedia topic titled: [Comparison of file systems][2]. It has the most extensive list of filesytems I'm aware of along with a nice table of the various features and the status of whether it's supported or not within a given filesystem.

### References
- http://unix.stackexchange.com/q/91197/22222
- http://unix.stackexchange.com/questions/20460/how-do-i-do-a-ls-and-then-sort-the-results-by-date-created
- http://unix.stackexchange.com/questions/50235/list-files-created-on-sundays
- http://unix.stackexchange.com/questions/24441/get-file-created-creation-time
- http://unix.stackexchange.com/questions/26205/why-does-unix-time-start-at-1970-01-01/87417#87417


  [1]: http://en.wikipedia.org/wiki/Hierarchical_File_System
  [2]: http://en.wikipedia.org/wiki/Comparison_of_file_systems