title: File creation time in unix
body: <p>Can anybvody tell me why unix does not store the file creation time?
  Is it such a big burden to it as it stores modification time,change time and access time but not creation time?
  Is there any specific reason for it?</p>
  
  <p>or is it through using some language(any programming language) and some system calls can we get the file creation time some how?</p>