can't say it'd "ruin her day" with your presence so no, I don't buy that part.
But it does seem as if you are reaching out to her. Why do that?
I mean, is this a form of pursuit at all? It's not commemorating YOUR R with her. It's about a personal achievement of hers which you assume she has maintained...and in truth, you thought was related to her ultimate choice to leave. So,
Are you sure you won't expect something from her in response,
and
or
that she won't see it as pursuit? If she does see it that way, do you care?
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016