Deal with it.
I'm considering today "Day 1."
Various other facts concerning the aforementioned series:
My least favorite of the series was book 4.
My favorites are books 3, 6 and 7.
Favorite characters: Lupin, Sirius, and Snape.
(I have trouble picking just one favorite of anything.)
I wasn't expecting so many people to die. It was a wee bit depressing.
I cried at two specific moments in book 7.