I can assure you that it has not be continuously offline since yesterday, but rather it must have crashed earlier today, before you attempted to log in again. As other users have mentioned in the thread, if no information is broadcasted on twitter regarding the downtime, and if the status checker doesn't indicate that it's locked for maintenance, you can assume this is not planned downtime.
Also, there was no need to resurface a thread as old as this for the answer you wanted. The information you're seeking has been made available elsewhere, and a quick examination of the status checker page or a forum search could have answered it faster than posting on an older thread.