7 years, 8 months.

Dear Holly,

For the weeks leading up to Christmas Day, you had been making Mommy and me aware of your newest very wiggly tooth. We kept speculating what it would be like to lose your 2nd tooth right before Christmas.
Sure enough, on Christmas Eve, you approached me in the kitchen, showing off how loose your tooth had become.
I did what is simply in my nature to do: I effortlessly snatched out that tiny little tooth for you.
Confirmation: The Tooth Fairy gave you 10 dollars for that tooth, alongside the cookie that Santa took a bite out of.
Love,
Daddy