The homepage, forum and wiki will be going offline for up to an hour on 2019-01-26, between 10:00 and 11:00 UTC.
In your local time (if you are logged in and have your time offset correctly configured), this is:
January 26, 2019, 10:00:00 AM
The intent is to migrate the server which hosts the homepage, forum and wiki to a different (but related) operating system, which should provide reliability, security and maintenance benefits going forward.