Laravel localised DateTimes with UTC Database storage

components_date-time.blade.php

@props(['date', 'relative', 'classes'])

<time datetime="{{ $date->toIso8601String() }}">
    @unless($relative)
        {{ $date }}
    @else
        {{ $date->diffForHumans(now()) }}
    @endunless
</time>

DateTimeComponent.php

<?php

namespace App\View\Components;

use Illuminate\Contracts\View\View;
use Illuminate\Support\Carbon;
use Illuminate\View\Component;

class DateTime extends Component
{
    public function __construct(
        public Carbon $date,
        public bool $relative = false,
        public string $classes = '',
    ) {
        // Use either the User's preferred timezone or the app configured one
        $timezone = auth()->user()->timezone ?? config('app.timezone');

        // Extract locale from request header or the app configured one
        [ $locale ] = explode(
            ',',
            request()->header('Accept-Language', config('app.locale'))
        );

        // Apply User's prefences
        $this->date
            ->timezone($timezone)
            ->locale($locale);
    }

    /**
     * Get the view / contents that represent the component.
     *
     * @return \Illuminate\Contracts\View\View|\Closure|string
     */
    public function render(): View
    {
        return view('components.date-time');
    }
}

DateTimeTrait.php

<?php

namespace App\Models\Traits;

use Carbon\Carbon;

trait DateTime
{
    /**
     * If Carbon - Set the timezone to `app.timezone` configuration
     *
     * @param mixed $value
     *
     * @return \Carbon\Carbon|mixed
     */
    protected function asDateTime($value)
    {
        if($value instanceof Carbon) {
            $value->timezone(config('app.timezone'));
        }

        return parent::asDateTime($value);
    }

    /**
     * If Carbon - Set the timezone to `app.timezone` configuration
     *
     * @param mixed $value
     *
     * @return \Carbon\Carbon|mixed
     */
    public function fromDateTime($value)
    {
        if($value instanceof Carbon) {
            $value->timezone(config('app.timezone'));
        }

        return parent::fromDateTime($value);
    }
}

ExampleModel.php

<?php

namespace App\Models;

use App\Models\Traits\DateTime;
use Illuminate\Database\Eloquent\Model;
// [...]

class ExampleModel extends Model
{
    use DateTime;
    // [...]
    
    /**
     * The attributes that should be cast.
     *
     * @var array
     */
    protected $casts = [
        'a_date' => 'datetime',
        'anoter_date' => 'datetime',
    ];
    
     // [...]
}

views_a-view.blade.php

<x-date-time :date="App\Models\ExampleModel::find(1)->a_date" />

<x-date-time :relative="true" :date="App\Models\ExampleModel::find(1)->a_date" />

Cannot include / in filenames on Gist, so updated Class names to indicate type, and you can use namespaces to assign directory structure