Yes, it is true that the walkaways seem to be able to erase the memory of the date.
One year after ex left (he left right after our 25th) he came over on our anniversary. Our precious kitty had died recently of kidney failure so I asked him to come outside to see the memorial we had put in the garden for her. I was teary about us being split and it being our 26 anniversary. He asked me what was wrong and before I could say - he told me it must be about the cat. He did not have a clue, even when asked - what day it was.
