If you are workshop bound, expecting to arrive at your destination 18 hours before the start of class, beware Mercury in retrograde, as it messes with schedules and communication. I found this out when I missed my 9AM flight to Minneapolis, and discovered that the only remaining flight was at 9PM, arriving at midnight, workshop beginning at 9 the following morning. Instead of warping in the privacy and luxury of my hotel room, I warped and threaded my loom at the International Terminal of JFK airport. Curse you, Mercury!! Fail.