diff --git a/src/Http/Controllers/IcsController.php b/src/Http/Controllers/IcsController.php
index ba10861..879ae55 100644
--- a/src/Http/Controllers/IcsController.php
+++ b/src/Http/Controllers/IcsController.php
@@ -3,6 +3,7 @@
 namespace TransformStudios\Events\Http\Controllers;
 
 use Carbon\CarbonImmutable;
+use Carbon\Exceptions\InvalidFormatException;
 use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
 use Illuminate\Foundation\Bus\DispatchesJobs;
 use Illuminate\Foundation\Validation\ValidatesRequests;
@@ -25,8 +26,13 @@ class IcsController extends Controller
 
     public function __invoke(Request $request)
     {
+        try {
+            $date = $request->filled('date') ? CarbonImmutable::parse($request->input('date')) : null;
+        } catch (InvalidFormatException $e) {
+            abort(404, 'Event not found');
+        }
+
         $handle = $request->string('collection', 'events');
-        $date = $request->has('date') ? CarbonImmutable::parse($request->get('date')) : null;
         $eventId = $request->string('event');
         $entry = null;
 
diff --git a/tests/Http/Contollers/IcsControllerTest.php b/tests/Http/Contollers/IcsControllerTest.php
index d484c15..57a9134 100755
--- a/tests/Http/Contollers/IcsControllerTest.php
+++ b/tests/Http/Contollers/IcsControllerTest.php
@@ -172,7 +172,7 @@
     $this->assertStringContainsString('DESCRIPTION:The description', $response->streamedContent());
 });
 
-test('throws404 error when event does not occur on date', function () {
+test('throws 404 error when event does not occur on date', function () {
     Carbon::setTestNow(now()->setTimeFromTimeString('10:00'));
 
     $this->get(route('statamic.events.ics.show', [
@@ -181,7 +181,7 @@
     ]))->assertStatus(404);
 });
 
-test('throws404 error when event does not exist', function () {
+test('throws 404 error when event does not exist', function () {
     Carbon::setTestNow(now()->setTimeFromTimeString('10:00'));
 
     $this->get(route('statamic.events.ics.show', [
@@ -189,3 +189,10 @@
         'event' => 'does-not-exist',
     ]))->assertStatus(404);
 });
+
+test('throws 404 error when date is invalid', function () {
+    $this->get(route('statamic.events.ics.show', [
+        'date' => 'not-a-date',
+        'event' => 'the-id',
+    ]))->assertStatus(404);
+});