This directory contains precompiled binaries of Thunderbird. These are NIGHTLY BUILDS. They are completely untested. We don't even know if they start up without crashing. DO NOT DOWNLOAD THESE unless you have first read all of http://www.mozilla.org/developer/#builds and fully understood the consequences! Directories are named according to YYYY/MM/YYYY-MM-DD-HH-[Milestone]. So files in the directory 2007/10/2007-10-04-05-mozilla1.8 are Thunderbird 2.0.0.7pre nightly builds that were built on October 4, 2007 at 5am PDT. A previous month's builds are listed at the top level, use the full YYYY/MM/YY... style if you want a permanent link.
dm-ftp01.mozilla.org in the Pacific Time Zone (PST/PDT)