Actually October 7th works better. I volunteered to help put on a learning seminar in honor of Sally Ride (women in the work place) on how optics, illusions, and engineering work at University of Michigan on Sept 30th.
http://www.sallyridefestivals.com/
Unless.... You want to do it the weekend of the 28th... My birthday weekend

My birthday is on a thursday but it'll do... Or we can...

doesn't matter... Just have to pre-plan my schedule fills in quickly. Especially if I start teaching at the school when I get back from Europe.