I think it doesn't actually switch out for another hour due to the daylight savings time change.
The assault hasn’t switched on my server. People are saying another hour, I guess due to the time change?
Looks like you have a copy and paste error within the article (still talking about February):AqirAssault - UldumThe two lesser assaults will happen in Uldum this week, with Aqir as the first one! This assault lasts for 3 days and 12 hours, flipping over to the Amathet assault on Friday, February 28th at 7pm PT for NA servers, and on Saturday, February 29th, at 8pm CEST for EU servers.
The assault changed at 8 pm PST on Whisperwind server. I happened to be in Uldum, just finished the dailies, when it flipped.