Harry the bunny, a happy, funny and very friendly bunny, decides to celebrate his mommy's birthday and throw a big surprise birthday party for her. With his friends' help he goes through many challenges, bakes mommy a cake and arranges everything while counting from 1 to 10, playing, singing, and having lots of fun.
Unfortunately the movie Harry's Big Birthday Countdown is not yet available on HBO Max.
| Production | Arnold Messer | Executive Producer |
| Production | Arik Kerman | Development Producer |
| Art | Fernando Yache | Additional Storyboarding |
| Production | Arik Kerman | Producer |
| Sound | Tal Yardeni | Original Music Composer |
| Crew | Ornan Braier | Animatronic and Prosthetic Effects |
| Art | On Spizman | Art Designer |
| Costume & Make-Up | Colleen Atwood | Costume Design |
| Art | Assaf Benharroch | Background Designer |
| Sound | Eran Scheffer | Dialogue Editor |
| Production | Lilac Sarig Shai | Production Manager |
| Camera | Doron Farhi | First Assistant Camera |
| Art | Ion Vargelis | Assistant Set Dresser |
| Visual Effects | Gali Edelbaum | Animation |
| Sound | Meny Asikend | Dialogue Editor |
| Lighting | Alon Fabishevich | Assistant Gaffer |
| Camera | Lior Etrogi | Grip |
| Visual Effects | Nir Graber | Animation |
| Editing | Ido Karilla | Colorist |
| Production | Racheli Fishman | Line Producer |
| Camera | Adam Aber | Assistant Grip |
| Crew | Yuval Segal | Mixing Engineer |
| Lighting | Oren Gur | Assistant Gaffer |
| Production | Hanna Gutman | Production Coordinator |
| Production | Orit Ratsabi-Ron | Production Assistant |
| Sound | Michael HarPaz | Vocals |
| Sound | Ellior Greenberg | Vocals |
| Sound | Hagai Ginzboorg | Vocal Coach |
| Sound | Omri Levi | Dialogue Editor |
| Sound | Ami Offir | Dialogue Editor |
| Lighting | Danny Rogovin | Gaffer |
| Production | Guy Oranim | Executive Producer |
| Production | Sharon Rechter | Executive Producer |
| Production | David Cooper | Executive Producer |
| Production | Guy Oranim | Development Producer |
| Sound | Racheli Fishman | Music Producer |
| Visual Effects | Itamar Daube | Character Designer |
| Editing | Eran Shtrum | Editor |
| Sound | Eran Lee Barkat | Sound Effects Designer |
| Sound | Ami Offir | Sound Mixer |
| Production | Vered Zror | Development Producer |
| Camera | David Zarif | Director of Photography |
| Crew | Maria Gurevich | Animatronics Designer |
| Visual Effects | Rotem Moshkovitz | Character Designer |
| Sound | Ohad Shachar | Sound Director |
| Sound | Ami Offir | Sound Effects Designer |
| Production | Mike Medavoy | Executive Producer |
| Production | Itamar Daube | Development Producer |
| Art | Erez Yaniv | Set Designer |
| Directing | Assaf Mizrahi | Layout |
| Visual Effects | Barak Drori | Compositing Artist |
| Visual Effects | Alyona Belova | Animation |
| Visual Effects | Nadav Nevo | Animation |
| Crew | Tal Yardeni | Score Engineer |
| Writing | Daniel Kader | Dialogue |
| Directing | Gilat Ginsberg | Assistant Director |
| Art | Assaf Mizrahi | Storyboard Artist |
| Visual Effects | Assaf Mizrahi | Character Designer |
| Art | Shira Korach | Background Designer |
| Writing | Igor Vlasenko | Dialogue |
| Crew | Len Levitt | Animatronic and Prosthetic Effects |
| Crew | Roiy Nitzan | Post Production Consulting |
| Sound | Meny Asikend | Sound Effects Designer |
| Crew | Ilan Savir | Animatronic and Prosthetic Effects |
| Visual Effects | Tanya Grishko | Animation |
| Visual Effects | Nadav Nevo | Character Designer |
| Sound | Gabriella Lewis | Vocals |
| Sound | Simon Shocket | Sound Director |
| Writing | Tomer Shavit | Dialogue |
| Sound | Meny Asikend | Sound Mixer |
| Art | Hanita Brownstein | Set Dresser |
| Directing | Assaf Mizrahi | Director |
| Writing | Carin Greenberg | Writer |
| Sound | Eran Lee Barkat | Foley Artist |
| Lighting | Lee Klein | Gaffer |
| Camera | Saul Prosper | Grip |
