If I'm being totally honest, yes it would probably irk me at first, but I wouldn't say so or show it. I would bite my tongue, wish her congratulations and ask what she needed my help with. Even if she did run it by you, what difference would that have made?
Ideally, we are happy for friends and relatives when they announce wedding news. Suggesting she choose another date just creates tension. Hopefully you and your husband will many more anniversaries together down the road, and can adjust to the change of plans this year.
Fingers crossed you can get a refund on any hotel/airfare you have already paid for!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.