what do you call the day you bring your foster/adopt child home?

Today is the two year anniversary of bringing home my little Chubbs. I actually held him the first time the day before but they kept him one more night. I want to recognize the day each year but what to call it. I know in private Adoption world they often refer to it as "Gotcha Day" but I am not comfortable with that nomenclature. We complain all if the time about what our foster children go through all because they are considered the "property" if their birth parents. So using a word that implies ownership doesn't sit right with me. So, what do you call it?