4 years

Lorelai: And it's so hard to believe that at exactly this time many moons ago, I was lying in exactly the same position --

Rory: Oh, boy. Here we go.

Lorelai: Only I had a huge, fat stomach and big fat ankles and I was swearing like a sailor--

Rory: On leave.

Lorelai: On leave -- right! And there I was --

Rory: In labor.

Lorelai: And while some have called it the most meaningful experience of your life, to me it was something more akin to doing the splits on a crate of dynamite.

Rory: I wonder if the Waltons ever did this.

Lorelai: And I was screaming and swearing and being surrounded as I was by a hundred prominent doctors, I just assumed there was an actual use for the cup of ice chips they gave me.

Rory: There wasn't.

Lorelai: But pelting the nurses sure was fun.

And for her birthday The Girl got a SNOW DAY...sweet.
Happy Birthday my girl.