Blizzard QA Hortus has announced that both the World of Warcraft Public Test Realms and Tournament Test Realms will be down today, March 5.

Expect both realms to be inaccessible for around four to six hours as the developers do some site maintenance and update both to the latest builds.

So far, no news on what changes the latest build will have. However, you might want to know that Hortus previously mentioned that TTR changes would be coming soon and that the developers plan on revamping the starting areas and repositioning NPCs to make them more accessible.