I'm trying to find authoritative documentation in interim meetings. I've found this: <https://svn.tools.ietf.org/agenda/91/> But it does not say which time zone the schedule uses, and the hyperlinks for the meeting rooms do not reveal further information. There is some documentation here: <http://www.ietf.org/iesg/statement/interim-meetings.html> But it is silent on the default time zone or instructions how to access the conference facilities.