The dating anniversary is from the first time he asked you on a date.
Discussion
would "hey do you want to come back to my apartment and watch Boondock Saints" count as a date?
No. If you said, "Would you like to join me at my place to watch Boondock Saints? I'm asking you on a date." That would be a date.
One of my partners defines a Date™ as requiring:
0. Prior communication of intention that it is a Date™.
1. A meal.
2. A shared dessert.
3. An activity.
Girl's got standards (:

