I get this is not yet peer reviewed, but put a date on it that represents the last time it was touched. Like a last modified date or something. And it's not like it will get a date on it once it is peer reviewed. Someone will find it 5 years from now and think it still represents the state of the art.
Does anyone know why academic papers do not include dates in the paper? Surely there must be a reason?
Edit: StackExchange  cites uncertainty of the delay between writing and publication as the typical reason for omitting the date. This seems fair, but at least including the year would be nice. If you submit for review at the end of the year, probably safe to increment it by one. Even so, presumably there might be later drafts after review, so those should include the date.
Last-Modified: Mon, 09 Nov 2009 22:21:44 GMT