12/23 will never be the same for me. I unfortunately have a very good, vivid memory. It is a curse. And every 12/23 I will remember BD for the rest of my life no matter what happens (if we stay together or split up).
You might be surprised what a little time may do.. My last anniversary date went by without me realizing the day until it was almost over (although when I see the date written out I do recognize what it was, but don't feel any nostalgia over it). As I write this, I realize that I don't even remember BD date (although I do remember the months in which I first recognized something wrong and the month BD happened). My point is, if you allow yourself to forget the significance of those "dates", you may be able to remove them from the important dates in your history.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized