leenooks/src/Casts/LeenooksCarbon.php

<?php

namespace Leenooks\Casts;

use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
use Illuminate\Database\Eloquent\Model;
use Leenooks\Carbon;

class LeenooksCarbon implements CastsAttributes
{
    /**
     * Cast the given value.
     *
     * @param  array<string, mixed>  $attributes
     */
    public function get(Model $model, string $key, mixed $value, array $attributes): ?Carbon
    {
        return $value ? Carbon::create($value) : NULL;
    }

    /**
     * Prepare the given value for storage.
     *
     * @param  array<string, mixed>  $attributes
     */
    public function set(Model $model, string $key, mixed $value, array $attributes): string
    {
        return ($value instanceof Carbon ? $value : $this->get($model,$key,$value,$attributes))->format('Y-m-d H:i:s');
    }
}