Hello,
I think that any vacation is a big deal. Maybe he hasn't been in therapy himself and doesn't know how it feels.
I know exactly how you feel. My T was on vacation the first two weeks of July. Now she has told me she is going on vacation the last week of July. It is not fair. Especially, since she is also my Pdoc. Also, my back up T is on vacation too.

I think we should hold a revolt and let therapists know everywhere that they can't go on vacation without us!!