parking_manage_system/app/Models/AdminNotice.php

<?php

namespace App\Models;

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

class AdminNotice extends Model
{
    use HasFactory, Notifiable;

    protected $table = 'admin_notice';

    /**
     * The attributes that should be hidden for serialization.
     * @var array<int, string>
     */
    protected $hidden
        = [
            'updated_at',
            'deleted_at'
        ];

    public function getAlarmTimeAttribute($value): string
    {
        return get_datetime('datetime', strtotime($value));
    }
}