Steam going down for three hours on Thursday, from 6-9.00pm PST.
According to a post on Steam's site:
"Beginning at 6:00 pm Pacific time Thursday February 4th, we will be performing software maintenance on some Steam servers. We expect the resulting downtime to last three hours at most, putting the end of the window at 9:00 pm Pacific time.
"Some Steam services will be offline during this time. Affected services will include the Steam Community, in-game matchmaking or lobbies, downloading games from Steam content servers, and making purchases from the Steam store. Games that do not rely on Steam matchmaking services should remain playable."
Steam. Offline. Try not to kill yourselves. Read a book, or something.