Birthdays

Characters
The children at Grace Field House are assigned false birthdays to prevent the Mamas and Sisters from knowing which baby is theirs, so the following birthdays may not be their real birthdays. However, the closer two children are in age, the closer their ID Numbers will be to one another. So even if it is not their real birthdays, it is likely very close to their real birthdays.

January

 * 7 - Leslie
 * 8 - Mark
 * 15 - Ray
 * 29 - Vincent

February

 * 2 - Zazie and Michelle
 * 19 - Pepe
 * 28 - Dominic
 * N/A - Ayshe

March

 * 21 - Norman
 * 23 - Cecile
 * 27 - Nigel

April

 * 9 - Olivia
 * 14 - Rossi
 * 25 - Anna
 * 28 - Lannion
 * 30 - Cislo

May

 * 13 - Gilda
 * 15 - Chris
 * 22 - Sandy

June

 * 3 - Sonya
 * 12 - Violet
 * 18 - Barbara

July

 * 4 - Don
 * 7 - Zack
 * 15 - Krone
 * 20 - Jemima
 * 31 - Phil

August

 * 22 - Emma
 * 27 - Carol
 * 30 - Thoma

September

 * 1 - Alicia
 * 3 - Conny
 * 9 - Isabella
 * 17 - Sherry
 * 23 - Peter Ratri
 * 30 - Gillian

October

 * 10 - Jin and Hayato
 * 25 - Oliver

November

 * 28 - Lucas

December

 * 7 - Sarah
 * 9 - Paula
 * 18 - Nat
 * 24 - Yugo
 * 31 - Yvette

People
Real people who worked on The Promised Neverland manga, anime, live action film, or spin-off.

January

 * 6 - Reiou Tsuchida (Japanese VA: Demon Guard 1)
 * 13 - Shin'ichirō Kamio (Japanese VA: Sonju)
 * 14 - Yūko Kaida (Japanese VA: Isabella)
 * 17:
 * Posuka Demizu (Manga Artist)
 * Mami Koyama (Japanese VA: Sarah)
 * 22 - Yurito Mori (Live Action: Phil)
 * 23 - Yūichirō Hirakawa (Live Action Film Director)
 * 25 - Noriko Goto (Live Action Film Writer)
 * 26 - Sanae Kobayashi (Japanese VA: Leslie)
 * 28:
 * Rihito Itagaki (Live Action: Norman)
 * Junpei Baba (Japanese VA: Demon Guard 2)
 * 30 - Hayato Kimura (Japanese VA: The Pursuer B)

February

 * 3 - Ryan Bartley (English VA: Gilda)
 * 5 - Leilani Akimoto (Live Action: Anna)
 * 9 - Crispin Freeman (English VA: Peter Ratri)
 * 10 - Yoshimasa Hosoya (Japanese VA: Peter Ratri)
 * 11 - Kimberley Anne Campbell (English VA: Jemima and Simon)
 * 13 - Erica Mendez (English VA: Emma)
 * 21 - Shinei Ueki (Japanese VA: Don)
 * 24 - Toshiya Ueda (Japanese VA: Vylk)
 * 28 - Miyu Ando (Live Action: Gilda)

March

 * 8 - Shūhei Miyazaki (The Parodied Jokeland Author/Illustrator)
 * 14 - Yasuyuki Kase (Japanese VA: William Minerva)

April

 * 4 - Janice Kawaye (English VA: Dominic, Chris, and Eugene)
 * 9 - Amber Connor (English VA: Phil)
 * 10 - Rikuto Ishizuka (Live Action: Tom)
 * 22:
 * Fuga Shibazaki (Live Action: Nat)
 * Yū Okano (Japanese VA: Radio Communicator A)
 * 23 - Sumire Morohoshi (Japanese VA: Emma)
 * 27 - Morgan Berry (English VA: Leslie)

May

 * 3 - Matthew David Rudd (English VA: Demon A)
 * 10 - Bob Carter (English VA: Yverk and Demon Operator)
 * 14 - Nao Fujita (Japanese VA: Krone)
 * 15:
 * Yoshino Aoyama (Japanese VA: Mark, Alicia, Vivian, and Nina)
 * Koko Hayashi (Japanese VA: Rossi, Eugene, and Damdin)
 * 19 - Kiyohiro Yamaguchi (Japanese VA: Demon A)
 * 22 - Mari Hino (Japanese VA: Thoma and Dominic)
 * 25 - J. Michael Tatum (English VA: The Pursuer A)

June

 * 1 - Lynn (Japanese VA: Gilda)
 * 5 - Takayuki Kondou (Japanese VA: Demon Guard 3)
 * 6 - Soma Santoki (Live Action: Don)
 * 10 - Risa Kaneko (Live Action: Nina)
 * 11 - Toshihiko Seki (Live Action: Demon)
 * 19 - Kousuke Okamoto (Japanese VA: The Pursuer A)
 * 21 - Hiyori Kono (Japanese VA: Phil and Chris)
 * 22 - Xanthe Huynh (English VA: Demon Emma)
 * 23 - Laura Post (English VA: Isabella)
 * 25 - Daman Mills (English VA: Sonju)
 * 26 - Yoshiki Nakajima (Japanese VA: Cislo)
 * 29 - Katusnori Shimizu (Anime Sound Director)

July

 * 8 - Yū Wakabayashi (Japanese VA: Man 1 and Demon Operator)
 * 11:
 * Cristina Vee (English VA: Thoma, Yvette, and Naila)
 * Allegra Clark (English VA: Rossi and Barbara)
 * 16 - Philece Sampler (English VA: Lannion, Sherry, and Sarah)
 * 17 - Erisa Kuon (Japanese VA: Jemima, Sherry, Marnya, and Tom)
 * 19 - Jeannie Tirado (English VA: Norman)
 * 25 - Shouto Kashii (Japanese VA: Demon 1)
 * 28 - Yuuko Mori (Japanese VA: Lannion and Naila)

August

 * 9 - Takuhiro Eda (Japanese VA: Man 3)
 * 10 - Ari Ozawa (Japanese VA: Conny)
 * 11 - Ryō Sugisaki (Japanese VA: Demon B)
 * 12 - Laura Stahl (English VA: Ray)
 * 14 - Jackie Lastra (English VA: Conny and Chamberlain)
 * 17 - Hiroaki Tajiri (Live Action: Demon)
 * 21 - Soushirou Hori (Japanese VA: Man 2)
 * 22 - Keiko Kitagawa (Live Action: Isabella)
 * 25 - Steve Cannon (English VA: Announcer)
 * 29:
 * Minami Hamabe (Live Action: Emma)
 * Erika Harlacher (English VA: Mark and Nina)
 * David Vincent (English VA: Demon A)
 * 30 - Kazuaki Shimada (Anime Character Design/Chief Animation Director)

September

 * 5 - Asada Halo (Live Action: Conny)
 * 6:
 * Jyo Kairi (Live Action: Ray)
 * Christina McBride (English VA: Additional Voices)
 * 9 - Hiroo Sasaki (Live Action: Demon)
 * 13 - Ai Kayano (Japanese VA: Anna)
 * 14 - Shizuka Ishigami (Japanese VA: Nat)
 * 22 - Michelle Ruff (English VA: Nat and Damdin)
 * 25 - Mariya Ise (Japanese VA: Ray)
 * 27 - Atsumi Tanezaki (Japanese VA: Mujika)

October

 * 2 - Masahiro Tokuda (Live Action Film Composer)
 * 4 - Natsuki Deguchi (Live Action: Young Isabella)
 * 8 - Yoshiko Mita (Live Action: Sarah)
 * 11 - Armen Taylor (English VA: Demon B and Grace Field Boss Demon)
 * 13 - Christopher Tergliafera (English VA: Demon B)
 * 17:
 * Tori Matsuzaka (Live Action: Peter Ratri)
 * Mark Whitten (English VA: Cislo)
 * 23 - Naomi Watanabe (Live Action: Krone)
 * 24 - Shinnosuke Ogamio (Japanese VA: Demon C and Grace Field Boss Demon)

November

 * 2 - Lizzie Freeman (English VA: Mujika)
 * 5 - Shigemi Ikeda (Anime Art Setting/Art Director)
 * 6 - Cam Clark (English VA: Demon C)
 * 10 - Takanori Kino (Japanese VA: Radio Communicator C)
 * 11 - Greg Chun (English VA: William Minerva)
 * 28 - Dorah Fine (English VA: Additional Voices)

December

 * 3 - Jalen K. Cassell (English VA: Vincent and Zazie)
 * 6 - Ruito Yamashiro (Live Action: Young Ray)
 * 7 - Hidenori Takahashi (Japanese VA: Vincent and Zazie)
 * 9 - Ken Murase (Live Action Film Producer)
 * 10 - Mick Lauer (English VA: The Pursuer B)
 * 17 - Motoki Sakuma (Japanese VA: Yverk)
 * 22 - Chika Anzai (Japanese VA: Barbara)
 * 24 - Kousei Kimura (Live Action: Lannion)
 * 25 - Keikou Sakai (Japanese VA: Demon 2)
 * 27 - Maaya Uchida (Japanese VA: Norman)
 * 30 - Nao Shiraki (Japanese VA: Yvette and Chamberlain)
 * 31 - Brianna Knickerbocker (English VA: Anna and Alicia)

Currently unknown birthdays

 * Kaiu Shirai (Manga Author)
 * Takushi Sugita (Manga Editor)
 * Nanao (Light Novel Author)
 * N/A (Japanese VA: Simon)
 * N/A (Japanese VA: Yukko)
 * N/A (Japanese VA: Smee)
 * N/A (Japanese VA: Demon Emma)
 * N/A (Japanese VA: Vivian)
 * Dai Kitamura (Japanese VA: Radio Communicator B)
 * Kodai Sensaki (Japanese VA: Man 4)
 * Cedric Williams (English VA: Don)
 * Rebeka Thomas (English VA: Krone)
 * Jake Eberle (English VA: Vylk and Smee)
 * N/A (English VA: Yukko)
 * N/A (English VA: Marnya)
 * N/A (English VA: Tom)
 * Breaugh Olson (English VA: Additional Voices)
 * Tiffany Oliver (English VA: Additional Voices)
 * Takahiro Obata (Anime Composer)
 * Toshiya Ono (Anime Series Structure)
 * Hiroki Itai (Anime Prop Design)
 * Shuichi Okubo (Anime Art Setting)
 * Kayoko Tomono (Anime Art Setting)
 * Miho Norisue (Anime Art Setting)
 * Yukiko Maruyama (Anime Art Director)
 * Kazuko Nakashima (Anime Color Design)
 * Tomoyuki Shiokawa (Anime Director of Photography)
 * Yo Fukuda (Anime CG Director)
 * Rie Matsubara (Anime Editor)
 * Mamoru Kanbe (Anime Director)
 * Motota Mizoguchi (Live Action: Thoma)
 * Adinan (Live Action: Dominic)
 * Kit Furuhashi (Live Action: Mark)
 * Misora Shimura (Live Action: Alicia)
 * Girard Sara (Live Action: Yvette)
 * Rupert Palmer (Live Action: Chris)
 * Shizuku Ota (Live Action: Sherry)
 * Haruka Sato (Live Action: Jasper)
 * Sayuki Miyajima (Live Action: Marnya)
 * Ariana (Live Action: Jemima)
 * Nbaiare (Live Action: Chamberlain)
 * Svediozas (Live Action: Damdin)
 * Domerichi Eden Kina (Live Action: Naila)
 * Dahlia N (Live Action: Vivian)
 * Touma H (Live Action: Hans)
 * Poésie Yano (Live Action: Carol)
 * Nobuyuki Ito (Live Action Editor)
 * Jun Shiozaki (Live Action Director)
 * Keisuke Imamura (Live Action Cinematography)
 * Miho Kobayashi (Live Action Producer)

Anniversaries
The dates various media for The Promised Neverland was released on.

January

 * 4:
 * Volume 7 (Japanese)
 * Volume 12 (Japanese)
 * Volume 17 (Japanese)
 * Moms' Song of Remembrance (Japanese)
 * 5 - Volume 18 (English)
 * 7 - Volume 13 (English)
 * 8 - The Promised Neverland Anime Season 2 (Japanese)
 * 11:
 * The Promised Neverland Anime Season 1 (Japanese)
 * The Parodied Jokeland (Japanese)

February

 * 3 - Volume 2 (Japanese)
 * 5 - Volume 8 (English)
 * 6 - Volume 2 (English)

March

 * 3 - Volume 14 (English)
 * 4:
 * Volume 13 (Japanese)
 * Volume 18 (Japanese)
 * Volume 13 Special Edition (Japanese)

April

 * 2 - Volume 9 (English)
 * 3 - Volume 3 (English)
 * 4:
 * Volume 3 (Japanese)
 * Volume 8 (Japanese)
 * 11 - The Promised Neverland Anime Season 2 (English dub)
 * 14 - The Promised Neverland Anime Season 1 (English dub)
 * 22 - Escape the Hunting Grounds (Japanese)
 * 30 - Miroirs (Japanese)

May

 * 4 - Volume 19 (English)

June

 * 2 - Volume 15 (English)
 * 4:
 * Volume 9 (Japanese)
 * Volume 10 (English)
 * Volume 14 (Japanese)
 * A Letter from Norman (Japanese)
 * The Parodied Jokeland Volume (Japanese)
 * 5 - Volume 4 (English)
 * 21 - Art Book World (English)

July

 * 3 - Volume 19 (Japanese)
 * 4 - Volume 4 (Japanese)

August

 * 1 - The Promised Neverland (Manga) (Japanese)
 * 2 - Volume 15 (Japanese)
 * 3:
 * Volume 10 (Japanese)
 * Volume 20 (English)
 * 4 - Volume 16 (English)
 * 6 - Volume 11 (English)
 * 7 - Volume 5 (English)

September

 * 3 - Kaiu Shirai x Posuka Demizu Short Stories (Japanese)
 * 4 - Volume 5 (Japanese)

October

 * 1 - Volume 12 (English)
 * 2:
 * Volume 6 (English)
 * Volume 20 (Japanese)
 * Records of Comrades (Japanese)
 * 4 - Volume 16 (Japanese)

November

 * 2:
 * Volume 6 (Japanese)
 * Volume 11 (Japanese)
 * 3 - Volume 17 (English)
 * 4 - Art Book World (Japanese)
 * 8 - Kaiu Shirai x Posuka Demizu Short Stories (English)

December

 * 2 - Volume 1 (Japanese)
 * 4:
 * Volume 7 (English)
 * Volume 0 (Japanese)
 * 5 - Volume 1 (English)
 * 4 - Films of Memories (Japanese)
 * 18 - The Promised Neverland Movie (Japanese)