diff --git a/app/Domain/EmployeesMilestoneRetriever.php b/app/Domain/EmployeesMilestonesRetriever.php
similarity index 97%
rename from app/Domain/EmployeesMilestoneRetriever.php
rename to app/Domain/EmployeesMilestonesRetriever.php
index d3084e2e..787c9117 100644
--- a/app/Domain/EmployeesMilestoneRetriever.php
+++ b/app/Domain/EmployeesMilestonesRetriever.php
@@ -8,7 +8,7 @@
 use Illuminate\Support\Collection;
 use Toby\Eloquent\Models\User;
 
-class EmployeesMilestoneRetriever
+class EmployeesMilestonesRetriever
 {
     public function __construct(
         protected VacationTypeConfigRetriever $configRetriever,
diff --git a/app/Infrastructure/Http/Controllers/EmployeesMilestonesController.php b/app/Infrastructure/Http/Controllers/EmployeesMilestonesController.php
index ace7b3e9..c35977e6 100644
--- a/app/Infrastructure/Http/Controllers/EmployeesMilestonesController.php
+++ b/app/Infrastructure/Http/Controllers/EmployeesMilestonesController.php
@@ -6,12 +6,12 @@
 
 use Illuminate\Http\Request;
 use Inertia\Response;
-use Toby\Domain\EmployeesMilestoneRetriever;
+use Toby\Domain\EmployeesMilestonesRetriever;
 use Toby\Infrastructure\Http\Resources\EmployeeMilestoneResource;
 
 class EmployeesMilestonesController extends Controller
 {
-    public function index(Request $request, EmployeesMilestoneRetriever $employeesMilestoneRetriever): Response
+    public function index(Request $request, EmployeesMilestonesRetriever $employeesMilestoneRetriever): Response
     {
         $searchText = $request->query("search");
         $sort = $request->query("sort");
diff --git a/app/Infrastructure/Http/Requests/UserRequest.php b/app/Infrastructure/Http/Requests/UserRequest.php
index 76b6ca9f..13b72757 100644
--- a/app/Infrastructure/Http/Requests/UserRequest.php
+++ b/app/Infrastructure/Http/Requests/UserRequest.php
@@ -22,7 +22,7 @@ public function rules(): array
             "position" => ["required"],
             "employmentForm" => ["required", new Enum(EmploymentForm::class)],
             "employmentDate" => ["required", "date_format:Y-m-d"],
-            "birthday" => ["nullable", "date_format:Y-m-d", "before:today"],
+            "birthday" => ["required", "nullable", "date_format:Y-m-d", "before:today"],
             "slackId" => [],
             "nextMedicalExamDate" => ["nullable", "after:lastMedicalExamDate"],
             "nextOhsTrainingDate" => ["nullable", "after:lastOhsTrainingDate"],
diff --git a/tests/Feature/EmployeesMilestonesTest.php b/tests/Feature/EmployeesMilestonesTest.php
index 3495d2b6..a5d3054d 100644
--- a/tests/Feature/EmployeesMilestonesTest.php
+++ b/tests/Feature/EmployeesMilestonesTest.php
@@ -8,20 +8,20 @@
 use Illuminate\Support\Carbon;
 use Inertia\Testing\AssertableInertia as Assert;
 use Tests\FeatureTestCase;
-use Toby\Domain\EmployeesMilestoneRetriever;
+use Toby\Domain\EmployeesMilestonesRetriever;
 use Toby\Eloquent\Models\User;
 
 class EmployeesMilestonesTest extends FeatureTestCase
 {
     use DatabaseMigrations;
 
-    protected EmployeesMilestoneRetriever $employeesMilestoneRetriever;
+    protected EmployeesMilestonesRetriever $employeesMilestonesRetriever;
 
     protected function setUp(): void
     {
         parent::setUp();
 
-        $this->employeesMilestoneRetriever = $this->app->make(EmployeesMilestoneRetriever::class);
+        $this->employeesMilestonesRetriever = $this->app->make(EmployeesMilestonesRetriever::class);
     }
 
     public function testUserCanSeeEmployeesMilestonesList(): void
@@ -57,13 +57,13 @@ public function testSortingByBirthdays(): void
             ->employee()
             ->create();
 
-        $sortedUsersByUpcomingBirthday = $this->employeesMilestoneRetriever->getResults(null, "birthday-asc")->values();
+        $sortedUsersByUpcomingBirthday = $this->employeesMilestonesRetriever->getResults(null, "birthday-asc")->values();
 
         $this->assertEquals($user1->id, $sortedUsersByUpcomingBirthday[0]->id);
         $this->assertEquals($user3->id, $sortedUsersByUpcomingBirthday[1]->id);
         $this->assertEquals($user2->id, $sortedUsersByUpcomingBirthday[2]->id);
 
-        $sortedUsersByFurthestBirthday = $this->employeesMilestoneRetriever->getResults(null, "birthday-desc")->values();
+        $sortedUsersByFurthestBirthday = $this->employeesMilestonesRetriever->getResults(null, "birthday-desc")->values();
 
         $this->assertEquals($user2->id, $sortedUsersByFurthestBirthday[0]->id);
         $this->assertEquals($user3->id, $sortedUsersByFurthestBirthday[1]->id);
@@ -87,13 +87,13 @@ public function testSortingBySeniority(): void
             ->employee()
             ->create();
 
-        $sortedUsersByLongestSeniority = $this->employeesMilestoneRetriever->getResults(null, "seniority-asc")->values();
+        $sortedUsersByLongestSeniority = $this->employeesMilestonesRetriever->getResults(null, "seniority-asc")->values();
 
         $this->assertEquals($user3->id, $sortedUsersByLongestSeniority[0]->id);
         $this->assertEquals($user2->id, $sortedUsersByLongestSeniority[1]->id);
         $this->assertEquals($user1->id, $sortedUsersByLongestSeniority[2]->id);
 
-        $sortedUsersByShortestSeniority = $this->employeesMilestoneRetriever->getResults(null, "seniority-desc")->values();
+        $sortedUsersByShortestSeniority = $this->employeesMilestonesRetriever->getResults(null, "seniority-desc")->values();
 
         $this->assertEquals($user1->id, $sortedUsersByShortestSeniority[0]->id);
         $this->assertEquals($user2->id, $sortedUsersByShortestSeniority[1]->id);
diff --git a/tests/Feature/UserTest.php b/tests/Feature/UserTest.php
index 3326be34..c52b15bf 100644
--- a/tests/Feature/UserTest.php
+++ b/tests/Feature/UserTest.php
@@ -101,6 +101,7 @@ public function testAdminCanCreateUser(): void
                 "email" => "john.doe@example.com",
                 "employmentForm" => EmploymentForm::B2bContract->value,
                 "employmentDate" => Carbon::now()->toDateString(),
+                "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
             ])
             ->assertSessionHasNoErrors();
 
@@ -121,6 +122,7 @@ public function testAdminCanCreateUser(): void
             "position" => "Test position",
             "employment_form" => EmploymentForm::B2bContract->value,
             "employment_date" => Carbon::now()->toDateString(),
+            "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
         ]);
     }
 
@@ -137,6 +139,7 @@ public function testItCreatesProperPermissionsWhileCreatingUser(): void
                 "email" => "john.doe@example.com",
                 "employmentForm" => EmploymentForm::B2bContract->value,
                 "employmentDate" => Carbon::now()->toDateString(),
+                "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
             ])
             ->assertSessionHasNoErrors();
 
@@ -165,6 +168,7 @@ public function testAdminCanEditUser(): void
             "last_name" => $user->profile->last_name,
             "employment_form" => $user->profile->employment_form->value,
             "employment_date" => $user->profile->employment_date->toDateString(),
+            "birthday" => $user->profile->birthday->toDateString(),
         ]);
 
         $this->actingAs($admin)
@@ -176,6 +180,7 @@ public function testAdminCanEditUser(): void
                 "position" => "Test position",
                 "employmentForm" => EmploymentForm::B2bContract->value,
                 "employmentDate" => Carbon::now()->toDateString(),
+                "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
             ])
             ->assertSessionHasNoErrors();
 
@@ -192,6 +197,7 @@ public function testAdminCanEditUser(): void
             "position" => "Test position",
             "employment_form" => EmploymentForm::B2bContract->value,
             "employment_date" => Carbon::now()->toDateString(),
+            "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
         ]);
     }
 
@@ -239,6 +245,7 @@ public function testChangingUserRoleUpdatesPermissions(): void
                 "position" => "Test position",
                 "employmentForm" => EmploymentForm::B2bContract->value,
                 "employmentDate" => Carbon::now()->toDateString(),
+                "birthday" => Carbon::create(1990, 5, 31)->toDateString(),
             ])
             ->assertSessionHasNoErrors();