Vacation interruptus

So, Dan's new company has shifted an overseas meeting right into the one week of summer vacation we were planning to take this year. And how can he say no, really? He is under tremendous pressure to prove himself, and if he keeps getting another job every two years, he'll pretty much always be under pressure. The corporations have we peons right where they want us. I've spent a lot of time and care planning this vacation. It's a week at the beach, Sunday to Sunday, and now Dan has to leave on Thursday. My resentment level is pretty high.