We've been going on Saturday and combining it with the 5K fun run that we normally do on Saturday mornings at 9 a.m. Yesterday we ran 11K before walking with the "fun run" group. Which is funny because it was the fun run but nobody was running.

Maybe that was why it was fun.
The reason for not doing long runs on Sundays was (and this is my own personal preference), I wanted to bike on Sunday mornings. There is less vehicle traffic on Sunday mornings than Saturdays, so it is nicer for cycling. And my legs shouldn't be as tired on Saturday mornings for the long run as Friday is my "off" day.
Heather and I aren't going to be around next Sat though, because we are going to be in Montreal celebrating Josephine's 2nd birthday. Sandy may still be going out. She always posts when and for how long she is going.
We are pretty slow too.