Good evening, EU!
The EU region shards will be coming down at 2:00am GMT, 31/1/13, for both 2.1 hotfix #6 and backend server software updates. The estimated downtime is ** 4 hours ** which we hope to come in well under.
Patch notes will be updated, and have already been posted in English here on the forums!
I'll be back during the downtime with status updates as I get 'em.