<human>: Summarize the given text in a few sentences.

I just got a new job and found out I have to go away to another country due to work during our anniversary. She knew that I had to travel for this job, but we didn't know when and where.

Now, she's mad/upset about the trip (and secretly have been for days). My side of the story is that it's a new job and I have no power to negotiate this. I've also asked her to come with me so we can spend some time during our anniversary together. She declined saying I'm going away for work so she shouldn't go. Maybe next year I will have a say in the matter, but this year it's not possible.

How can I reason with her? She won't have any of my explanation and compromise (new job - little choice in the matter, and the option to travel with me).

IMO, she puts our anniversary on such a high pedestal that it's blinding her to reason. 

We have been together for over 3 years.
<bot>: Wife is being unreasonable with me that I must travel during our anniversary. I gave her an option to go with me and she declined. No other options. How do I convince her that she shouldn't be mad over such things?