Oh, Echoes, that's hard. I had my T rearrange my schedule a couple of times (in 9 years) and the away from Friday was the worst for me too; I loved having the weekend to process stuff that had come up. But she at least told me what was going on; we had to move a couple because she started taking a class on Fridays that she thought would only be once or twice but they put the whole "semester" of meetings then so she asked could we change. Then we got to Wednesday and she kept having to change it earlier and earlier (and I was at work on Wednesdays so had to keep leaving earlier :-) so I ended up only working half a day on Wednesdays.

But my T was relatively straightforward with me what was happening in her life and we spent a few times (as much as I wanted) discussing the change after it happened, even a couple months down the road or before the next change, etc. I was lucky though because I'd seen her for therapy before and we'd moved around often then; days of the week, time, and physical locations, and so I was a bit more comfortable with change gone through with her.

Maybe next session you can mention you've been obsessing, er, thinking about it and you might prefer Thursdays and could you all try Mondays for a couple weeks and then Thursday for a couple and decide then If you use the magic phrase, ". . .and see which is best for both of us" she has to sit up and take notice of that