The unix.uvic.ca machines - at least, the ones I've used - have a 32-bit architecture. Because of this, PHP's timestamp handling is limited from Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT (see http://uk3.php.net/manual/en/function.date.php ). 64-bit architecture allows for basically limitless timestamps.
This limitation poses a problem because the Bailey data importer deals exclusively with dates before 1901.