$query = Booking::with([
            'bookingLessons.bookingLessonDetails',
        ])
        ->whereBetween('starts_at', [
            $this->startOfCalendar(),
            $this->endOfCalendar()
        ])
        ->orderBy('starts_at', 'asc');

        $bookings = $query->get();

        if(request()->has('bookingId')) {
            $query->where('id', request('bookingId'));
        }

[stacktrace]
#0 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Support\\Str.php(242): str_contains(Object(Closure), '@')
#1 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Support\\Str.php(692): Illuminate\\Support\\Str::contains(Object(Closure), Array)
#2 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Route.php(307): Illuminate\\Support\\Str::parseCallback(Object(Closure))
#3 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Route.php(287): Illuminate\\Routing\\Route->parseControllerCallback()
#4 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Route.php(272): Illuminate\\Routing\\Route->getControllerClass()
#5 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\formfeed-uk\\nova-dependable-panel\\src\\Http\\Middleware\\InterceptValidationFailure.php(64): Illuminate\\Routing\\Route->getController()
#6 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\formfeed-uk\\nova-dependable-panel\\src\\Http\\Middleware\\InterceptValidationFailure.php(31): Formfeed\\DependablePanel\\Http\\Middleware\\InterceptValidationFailure->isDependentFieldRequest(Object(Illuminate\\Http\\Request))
#7 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Formfeed\\DependablePanel\\Http\\Middleware\\InterceptValidationFailure->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#8 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\formfeed-uk\\nova-dependable-panel\\src\\Http\\Middleware\\InterceptDependentFields.php(31): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#9 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Formfeed\\DependablePanel\\Http\\Middleware\\InterceptDependentFields->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#10 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\nova\\src\\Http\\Middleware\\BootTools.php(20): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#11 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Laravel\\Nova\\Http\\Middleware\\BootTools->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#12 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\nova\\src\\Http\\Middleware\\DispatchServingNovaEvent.php(24): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#13 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Laravel\\Nova\\Http\\Middleware\\DispatchServingNovaEvent->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#14 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\inertiajs\\inertia-laravel\\src\\Middleware.php(92): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#15 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Inertia\\Middleware->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#16 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Middleware\\SubstituteBindings.php(50): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#17 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Routing\\Middleware\\SubstituteBindings->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#18 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\VerifyCsrfToken.php(78): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#19 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Foundation\\Http\\Middleware\\VerifyCsrfToken->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#20 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\View\\Middleware\\ShareErrorsFromSession.php(49): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#21 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\View\\Middleware\\ShareErrorsFromSession->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#22 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Session\\Middleware\\StartSession.php(121): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#23 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Session\\Middleware\\StartSession.php(64): Illuminate\\Session\\Middleware\\StartSession->handleStatefulRequest(Object(Illuminate\\Http\\Request), Object(Illuminate\\Session\\Store), Object(Closure))
#24 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Session\\Middleware\\StartSession->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#25 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\stancl\\tenancy\\src\\Middleware\\IdentificationMiddleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#26 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\stancl\\tenancy\\src\\Middleware\\InitializeTenancyBySubdomain.php(52): Stancl\\Tenancy\\Middleware\\IdentificationMiddleware->initializeTenancy(Object(Illuminate\\Http\\Request), Object(Closure), 'checkpoint')
#27 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\stancl\\tenancy\\src\\Middleware\\InitializeTenancyByDomainOrSubdomain.php(22): Stancl\\Tenancy\\Middleware\\InitializeTenancyBySubdomain->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#28 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Stancl\\Tenancy\\Middleware\\InitializeTenancyByDomainOrSubdomain->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#29 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Cookie\\Middleware\\AddQueuedCookiesToResponse.php(37): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#30 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Cookie\\Middleware\\AddQueuedCookiesToResponse->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#31 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Cookie\\Middleware\\EncryptCookies.php(67): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#32 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Cookie\\Middleware\\EncryptCookies->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#33 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(116): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#34 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(726): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))
#35 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(703): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Illuminate\\Http\\Request))
#36 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(667): Illuminate\\Routing\\Router->runRoute(Object(Illuminate\\Http\\Request), Object(Illuminate\\Routing\\Route))
#37 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(656): Illuminate\\Routing\\Router->dispatchToRoute(Object(Illuminate\\Http\\Request))
#38 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Kernel.php(190): Illuminate\\Routing\\Router->dispatch(Object(Illuminate\\Http\\Request))
#39 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(141): Illuminate\\Foundation\\Http\\Kernel->Illuminate\\Foundation\\Http\\{closure}(Object(Illuminate\\Http\\Request))
#40 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\livewire\\livewire\\src\\DisableBrowserCache.php(19): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#41 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Livewire\\DisableBrowserCache->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#42 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\nova\\src\\Http\\Middleware\\ServeNova.php(23): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#43 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Laravel\\Nova\\Http\\Middleware\\ServeNova->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#44 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\barryvdh\\laravel-debugbar\\src\\Middleware\\InjectDebugbar.php(66): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#45 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Barryvdh\\Debugbar\\Middleware\\InjectDebugbar->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#46 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#47 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\ConvertEmptyStringsToNull.php(31): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#48 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Foundation\\Http\\Middleware\\ConvertEmptyStringsToNull->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#49 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#50 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\TrimStrings.php(40): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#51 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Foundation\\Http\\Middleware\\TrimStrings->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#52 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#53 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#54 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance.php(86): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#55 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#56 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Http\\Middleware\\HandleCors.php(49): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#57 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Http\\Middleware\\HandleCors->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#58 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Http\\Middleware\\TrustProxies.php(39): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#59 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(180): Illuminate\\Http\\Middleware\\TrustProxies->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#60 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(116): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#61 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Kernel.php(165): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))
#62 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Kernel.php(134): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))
#63 C:\\Users\\Jeremiah\\Desktop\\projects\\valet\\app2\\public\\index.php(52): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))
#64 C:\\Users\\Jeremiah\\AppData\\Roaming\\Composer\\vendor\\cretueusebiu\\valet-windows\\server.php(241): require('C:\\\\Users\\\\Jeremi...')
#65 {main}

Calendar 1: Family
---- Event 1
---- Event 2
---- Event 3

Calendar 2: Job
---- Event 10
---- Event 11
---- Event 12
---- Event 13

class BookingEventGenerator extends CustomEventGenerator
{
    protected function modelQuery(EloquentBuilder $queryBuilder, Carbon $startOfCalendar, Carbon $endOfCalendar): EloquentBuilder
    {
        return $queryBuilder
            ->with([
                'electrician',
            ])
            ->where('from', '>=', $startOfCalendar)
            ->where('from', '<=', $endOfCalendar)
            ;
    }

    protected function resourceToEvents(NovaResource $resource): array
    {
        $out = [];
        
        $model = $resource->model();

        $event = new Event(
            'Booking #' . $model->id,
            $model->from,
            $model->to,
        );

        $event->notes('<b>Installer: </b>' . $model->electrician->first_name . ' ' . $model->electrician->last_name);

        $out[] = $event;

        return $out;
    }
}

use App\Providers\CalendarDataProvider;

public function register()
{
    $this->app->bind(CalendarDataProviderInterface::class, function($app) {
        return new CalendarDataProvider();
    });
}

use App\Providers\CalendarDataProvider;

public function tools()
{
    return [
        new NovaCalendar(new CalendarDataProvider),
    ];
}