Weekly Server Maintenance

After getting home from work (I work nights), I got online and was informed of a server shutdown! Quickly heading to the Blizzard Message boards I found the answer to this, and here it is for the rest of you:

As of now, we will be bringing down all the US realms for our regular maintenance. The downtime will normally be each Tuesday from 6AM to approximately 10AM PST.

Our apologies for any inconvenience this may cause.