I wouldn't say anything about the anniversary. I didn't last year and my W got to wonder if I cared or not. And even if your W acknowledges the anniversary or wants to see you on it, it doesn't mean she's done with GGW. That's what happened to me last year and I regretted opening myself to that without dealing with her long term commitment to our marriage. So I think you can say, in a detached way, that you're ok not recognizing the anniversary while her commitment is not there. But I wouldn't go telling her this out of the blue or anything.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.