The forum, wiki and IRC will be going offline for about five minutes on 2014-12-13, between 08:00 and 08:15 UTC.
For convenience, this means:
EST (USA east coast):
2014-12-13, 03:00-03:15
UTC (UK):
2014-12-13, 08:00-08:15
AEDT (Australia east coast):
2014-12-13, 19:00-19:15
The intent is to install security updates on the server which hosts the forum, wiki and IRC. These will be non-disruptive to functionality, as the server is running a stable OS release that gets critical fixes only.
Additionally, the opportunity will be taken to perform some tuning on the forum database server, which has been running on default settings since this website was set up; and to migrate the wiki off SQLite, which it was originally configured with. We now have enough real data and traffic that it is worth looking at what tuning is required to make the website run smoothly.