Below are the birthdays of many characters in Naruto.
January February March

01 - Gai 02 - Iwashi 04 - Haku 08 - Hiashi & Hizashi 19 - Gaara 23 - Shino	08 - Sarutobi 11 - Sigure 21 - Yoroi 29 - Kabuto	08 - Ebisu 09 - Tenten 18 - Kisame 20 - Ibiki 27 - Hanabi 28 - Sakura 29 - Kazekage

April May June

02 - Cloud Ninja Leader 03 - Udon 04 - Gatoh & Tonbo 05 - Tazuna 06 - Waraji	01 - Chouji 04 - Tsunami 07 - Midare 08 - Homura 15 - Kankurou 26 - Iruka 30 - Baiu	06 - Gouzu & Meizu 08 - Moegi 09 - Itachi 11 - Kurenai 12 - Dosu

July August September

03 - Neji 04 - Baki 06 - Kin 07 - Akamaru & Kiba 17 - Gemma 21 - Kotetsu 23 - Sasuke	02- Tsunade 15 -Zabuza 21 - Kaiza 23 - Temari 28 - Raidou	01 - Koharu 03 - Aoba 14 - Zaku 15 - Kakashi 22 - Shikamaru 23 - Ino

October November December

10 - Naruto 18 - Asuma 19 - Suzume 21 - Mizuki 24 - Anko 27 - Orochimaru	02 - Hayate 05 - Wind Country Lord 11 - Jiraiya 15 - Mubi 16 - Kagari 25 - Izumo 27 - Rock Lee 30 - Misumi	01 - Zouri 20 - Oboro 24 - Madam Shizimi 25 - Inari 27 - Hinata 30 - Konohamaru