When Do You Open Christmas Presents? [POLL]

It seems like an easy question to answer, but it can be complicated! When do you open Christmas presents?

Growing up we would open our Christmas presents on Christmas Eve with my mom and dad and grandparents leaving plenty of room for Santa to leave his gifts under the tree when we went to bed! Quite a few of my friends didn't follow what my family did, they weren't able to open Christmas presents until Christmas morning leaving them with a lot of surprises on Christmas morning!

Things become complicated with blended and split families, so answering the question can be complicated, I understand it completely.