Stork Drop, Gotcha Day, and Birth Parent Erasure

I know some adoptive parents celebrate "gotcha" day. I don't. I have 4 kids and I have enough trouble with birthdays and holidays. And adoption is based on loss. Plus, L, now 19, came to me at 6. He was originally slated to be RU with his bm. All I remember is he came to me in May. I wouldn't remember the exact date.