<?php

use Adtention\DatepickerField\Datepicker;
use Laravel\Nova\Http\Requests\NovaRequest;

public function fields(NovaRequest $request): array
{
    return [
        Datepicker::make('Start Date', 'start_date')
            ->rules(['nullable', 'date']),

        Datepicker::make('End Date', 'end_date')
            ->rules(['required', 'date'])
            ->readonly(fn (NovaRequest $request): bool => $request->isUpdateOrUpdateAttachedRequest()),
    ];
}

<?php

use Adtention\DatepickerField\Datepicker;
use Laravel\Nova\Http\Requests\NovaRequest;

public function fields(NovaRequest $request): array
{
    return [
        Datepicker::make('Start Date')
            ->rules(['required', 'date']),

        Datepicker::make('End Date')
            ->rules(['required', 'date', 'after_or_equal:start_date']),
    ];
}

Datepicker::make('Optional Date')
    ->rules(['nullable', 'date'])
    ->help('Leave empty if this date is not applicable.')
    ->readonly(fn (NovaRequest $request): bool => $request->isUpdateOrUpdateAttachedRequest());

Datepicker::make('Travel Date')
    ->min(now()->toDateString())
    ->max(now()->addYear()->toDateString())
    ->step(1)
    ->locale('da');