I was trying to log in earlier today, BEFORE the scheduled time for start of maintenance, but login was not responding on the client AND neither did it work on the forum; that was not my connection, I had no issues with other Internet sites.
It should now be maintenance time although the forum does not yet mention it as started, but login to the forum worked again roughly at the scheduled maintenance time.
Besides this, the forum now shows a times stamp where the minutes are off by a bit over 15 minutes (my PC is synchonized to time servers, so the forum IS off).