Somewhere in the Balkans, 1995. A team of aid workers must solve an apparently simple problem in an almost completely pacified territory that has been devastated by a cruel war, but some of the local inhabitants, the retreating combatants, the UN forces, many cows and an absurd bureaucracy will not cease to put obstacles in their way.
Unfortunately the movie A Perfect Day is not yet available on HBO Max.
| Directing | Fernando León de Aranoa | Director |
| Art | César Macarrón | Art Direction |
| Production | Fernando León de Aranoa | Producer |
| Production | Camilla-Valentine Isola | Casting |
| Writing | Paula Farias | Novel |
| Production | Jaume Roures | Producer |
| Art | César Macarrón | Production Design |
| Costume & Make-Up | Agathe Dupuis | Makeup Designer |
| Sound | Arnau Bataller | Original Music Composer |
| Sound | Alfonso Raposo | Sound |
| Costume & Make-Up | Caitlin Acheson | Hair Designer |
| Writing | Fernando León de Aranoa | Screenplay |
| Writing | Diego Farias | Co-Writer |
| Production | Luis Fernández Lago | Line Producer |
| Sound | Daniel Peña | Sound |
| Directing | Antonio Ordóñez | First Assistant Director |
| Production | Timka Grahić | Casting |
| Production | Javier Méndez | Executive Producer |
| Visual Effects | Raúl Romanillos | Special Effects Supervisor |
| Sound | Iván Marín | Sound |
| Costume & Make-Up | Fernando García | Costume Designer |
| Costume & Make-Up | Agathe Dupuis | Hair Designer |
| Camera | Álex Catalán | Director of Photography |
| Production | Patricia de Muns | Executive Producer |
| Editing | Nacho Ruiz Capillas | Editor |
| Visual Effects | Ferrán Piquer | Visual Effects Supervisor |
| Production | Ana Parra | Production Manager |
| Costume & Make-Up | Caitlin Acheson | Makeup Designer |
| Camera | Fernando Marrero | Still Photographer |
