When new messages or changes to the archive are available, the archive
is updated automatically at 6pm (Eastern Standard
Time) every day.
The archive is also occasionally updated at other times.
Last update: The date and time a page was last updated.
Note that if a Last update value is older than 12 hours it simply means that that particular part of the archive has not received additions since then.
Note also that some browsers will store a local copy of a page and not reload a more recent version unless told to. It is sometimes useful to force your browser to reload.