title: Date Time Encoding
body: <p>Any ideas or implementations floating about for encoding the current date including the milliseconds into the shortest possible string length?</p>
  
  <p>e.g I want 31/10/2011 10:41:45 in the shortest string possible (ideally 5 characters) - obviously decodable.</p>
  
  <p>If it is impossible to get down to 5 characters, then the year is optional.</p>
  
  <p>edit: it doesn't actually need to be decodable. It just needs to be a unique string.</p>