Leap Day at Orochimaru's Base, before the arrival of Naruto's group.

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Orochimaru: Hey Kabuto...

Kabuto: Yes, Orochimaru-sama?

Orochimaru: It's your birthday today, right?

Kabuto: Yeah, February 29th.

Orochimaru: But that's a leap day. Do you still celebrate every year?

Kabuto: -adjusts glasses- What makes you think I celebrate at all...?

Orochimaru: Oh come now, Kabuto... you've been with me for a long time. I know everything you do around here.

Sasuke: Would you two shut up? I'm trying to sleep over here.

Orochimaru: You're just mad because your birthday isn't today! So Kabuto, if you only have an actual birthday every four years, does that make you younger?

Kabuto: I'm still 22 years old.

Orochimaru: Yeah, but you don't have the actual DAY to make it real. So, if you only counted the years where the 29th happened, you'd only be... what, 5 or 6 years old right now.

Kabuto: I DO count the years in between...

Orochimaru: I won't. -drool-

Sasuke: Stupid pedophile...

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HAPPY BIRTHDAY Kabuto!