R.P.
I don't know about the date, but I have an idea for your anniversary. My husband and I did this for our first anniversary, and, really, there's no gift I treasure more.
Uncommon Goods makes a "12 Ways to Say I Love You" journal - http://www.uncommongoods.com/item/item.jsp?itemId=16729. We bought two, filled them out in secret, and exchanged them on our first anniversary. If my house was on fire, after the husband, the baby, and the dog, this would be the first thing I would grab. Good luck!