planifibot/app/Models/Evento.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Evento extends Model
{
    use HasFactory;

    public function dias() {
        return $this->hasMany(Dia::class);
    }

    public function coordinar() {
        foreach ($this->dias() as $dia) {
            //guardar (nombre, horario, cantidad)

        }
    }
}