I want to know too. But we need to be patient. Patience is a virtue and Collin is a procrastinator like me.
Even if it is. They will need to clear everything out and bring in the new stuff which can take a full day. Most likely the server will be closed while everything is sorted. Even if it was today, it would be like another 1-2 days before people can play.
I would expect for it to occur later in the evening when less players are on to be kicked offline while Collin resets it.
Keep an eye on the twitter feed on the home page. There should be an announcement there when Collin takes the server offline
It wasn't monday... what day is it??????????????? If it's at american night, EU is down again... see announcement 'Downtime'.