No WebCT all day on the coming Sunday - so go for a walk, fly a kite, or read a book and normal service will be resumed 8.00 monday morning.
Here's the full message from Weblearn:
The WebCT Vista service will be unavailable from 8:00am on Sunday, 17 July 2011 to 8:00am on Monday, 18 July 2011. This downtime is required to allow for an upgrade of the system to Version 8.0.5. Please note that the estimated duration of this downtime has been reduced from 29 to 12 hours following tests on a copy of the live data.