Laravel Nova Datetime field showing wrong value

It seems like you might be facing a timezone issue. Laravel Nova uses the application's timezone setting by default when displaying dates. If your application's timezone is different from the timezone of the stored dates in your database, this could lead to the incorrect display of date and time values in Nova.

Here's what you can do to ensure that the start_at and end_at fields are displayed correctly in Nova:

1. Make sure that your start_at and end_at fields are cast to datetime in your Event model. This will ensure that Laravel treats these fields as date objects.

class Event extends Model
{
    protected $casts = [
        'start_at' => 'datetime',
        'end_at' => 'datetime',
    ];
}

1. If your application is set to a different timezone than your database, you can specify the timezone in which you want to display your dates in Nova. You can do this by chaining the ->displayUsingTimezone() method to your DateTime field definition.

use Laravel\Nova\Fields\DateTime;

DateTime::make('Start At')
    ->displayUsingTimezone('UTC'), // Replace 'UTC' with the timezone of your database

DateTime::make('End At')
    ->displayUsingTimezone('UTC'), // Replace 'UTC' with the timezone of your database

1. If you want to ensure that the dates are stored in the database in UTC and displayed in the user's local timezone, you can use the ->withMeta() method to set the timezone attribute for the field.

DateTime::make('Start At')
    ->withMeta(['timezone' => 'UTC']), // Replace 'UTC' with the desired timezone

DateTime::make('End At')
    ->withMeta(['timezone' => 'UTC']), // Replace 'UTC' with the desired timezone

1. Lastly, ensure that your Nova resources are using the correct fields from your model. The field names passed to DateTime::make() should match the column names in your database.

If you've checked all of the above and the issue persists, it might be helpful to clear your config cache in case an old configuration is being used. You can do this by running the following Artisan command:

php artisan config:clear

After making these changes, check your Nova dashboard again to see if the start_at and end_at fields are displaying the correct values.