diff --git a/app/Http/Controllers/Api/V1/CalendarScheduleController.php b/app/Http/Controllers/Api/V1/CalendarScheduleController.php
new file mode 100644
index 0000000..2940683
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/CalendarScheduleController.php
@@ -0,0 +1,133 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Services\CalendarScheduleService;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class CalendarScheduleController extends Controller
+{
+    public function __construct(
+        private readonly CalendarScheduleService $service
+    ) {}
+
+    /**
+     * 일정 목록 조회
+     */
+    public function index(Request $request): JsonResponse
+    {
+        $request->validate([
+            'year' => 'required|integer|min:2000|max:2100',
+            'type' => 'nullable|string',
+        ]);
+
+        return ApiResponse::handle(
+            fn () => $this->service->list(
+                (int) $request->input('year'),
+                $request->input('type')
+            ),
+            __('message.fetched')
+        );
+    }
+
+    /**
+     * 통계 조회
+     */
+    public function stats(Request $request): JsonResponse
+    {
+        $request->validate([
+            'year' => 'required|integer|min:2000|max:2100',
+        ]);
+
+        return ApiResponse::handle(
+            fn () => $this->service->stats((int) $request->input('year')),
+            __('message.fetched')
+        );
+    }
+
+    /**
+     * 단건 조회
+     */
+    public function show(int $id): JsonResponse
+    {
+        return ApiResponse::handle(
+            fn () => $this->service->show($id),
+            __('message.fetched')
+        );
+    }
+
+    /**
+     * 등록
+     */
+    public function store(Request $request): JsonResponse
+    {
+        $validated = $request->validate([
+            'name' => 'required|string|max:100',
+            'start_date' => 'required|date',
+            'end_date' => 'required|date|after_or_equal:start_date',
+            'type' => 'required|string|in:public_holiday,temporary_holiday,substitute_holiday,tax_deadline,company_event',
+            'is_recurring' => 'boolean',
+            'memo' => 'nullable|string|max:500',
+        ]);
+
+        return ApiResponse::handle(
+            fn () => $this->service->store($validated),
+            __('message.created')
+        );
+    }
+
+    /**
+     * 수정
+     */
+    public function update(Request $request, int $id): JsonResponse
+    {
+        $validated = $request->validate([
+            'name' => 'required|string|max:100',
+            'start_date' => 'required|date',
+            'end_date' => 'required|date|after_or_equal:start_date',
+            'type' => 'required|string|in:public_holiday,temporary_holiday,substitute_holiday,tax_deadline,company_event',
+            'is_recurring' => 'boolean',
+            'memo' => 'nullable|string|max:500',
+        ]);
+
+        return ApiResponse::handle(
+            fn () => $this->service->update($id, $validated),
+            __('message.updated')
+        );
+    }
+
+    /**
+     * 삭제
+     */
+    public function destroy(int $id): JsonResponse
+    {
+        return ApiResponse::handle(
+            fn () => $this->service->delete($id),
+            __('message.deleted')
+        );
+    }
+
+    /**
+     * 대량 등록
+     */
+    public function bulkStore(Request $request): JsonResponse
+    {
+        $validated = $request->validate([
+            'schedules' => 'required|array|min:1',
+            'schedules.*.name' => 'required|string|max:100',
+            'schedules.*.start_date' => 'required|date',
+            'schedules.*.end_date' => 'required|date|after_or_equal:schedules.*.start_date',
+            'schedules.*.type' => 'required|string|in:public_holiday,temporary_holiday,substitute_holiday,tax_deadline,company_event',
+            'schedules.*.is_recurring' => 'boolean',
+            'schedules.*.memo' => 'nullable|string|max:500',
+        ]);
+
+        return ApiResponse::handle(
+            fn () => $this->service->bulkStore($validated['schedules']),
+            __('message.created')
+        );
+    }
+}
diff --git a/app/Models/Commons/Holiday.php b/app/Models/Commons/Holiday.php
new file mode 100644
index 0000000..216c8b7
--- /dev/null
+++ b/app/Models/Commons/Holiday.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Models\Commons;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Holiday extends Model
+{
+    use SoftDeletes;
+
+    protected $table = 'holidays';
+
+    protected $fillable = [
+        'tenant_id',
+        'start_date',
+        'end_date',
+        'name',
+        'type',
+        'is_recurring',
+        'memo',
+        'created_by',
+        'updated_by',
+    ];
+
+    protected $casts = [
+        'start_date' => 'date',
+        'end_date' => 'date',
+        'is_recurring' => 'boolean',
+    ];
+
+    public function scopeForTenant($query, int $tenantId)
+    {
+        return $query->where('tenant_id', $tenantId);
+    }
+
+    public function scopeForYear($query, int $year)
+    {
+        return $query->whereYear('start_date', $year);
+    }
+}
diff --git a/app/Services/CalendarScheduleService.php b/app/Services/CalendarScheduleService.php
new file mode 100644
index 0000000..a07a033
--- /dev/null
+++ b/app/Services/CalendarScheduleService.php
@@ -0,0 +1,180 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Commons\Holiday;
+use Symfony\Component\HttpKernel\Exception\HttpException;
+
+class CalendarScheduleService extends Service
+{
+    /**
+     * 연도별 일정 목록 조회
+     */
+    public function list(int $year, ?string $type = null): array
+    {
+        $query = Holiday::forTenant($this->tenantId())
+            ->forYear($year)
+            ->orderBy('start_date');
+
+        if ($type) {
+            $query->where('type', $type);
+        }
+
+        return $query->get()->map(function ($h) {
+            return [
+                'id' => $h->id,
+                'name' => $h->name,
+                'type' => $h->type,
+                'start_date' => $h->start_date->format('Y-m-d'),
+                'end_date' => $h->end_date->format('Y-m-d'),
+                'days' => $h->start_date->diffInDays($h->end_date) + 1,
+                'is_recurring' => $h->is_recurring,
+                'memo' => $h->memo,
+                'created_at' => $h->created_at?->toIso8601String(),
+                'updated_at' => $h->updated_at?->toIso8601String(),
+            ];
+        })->all();
+    }
+
+    /**
+     * 통계 조회
+     */
+    public function stats(int $year): array
+    {
+        $tenantId = $this->tenantId();
+        $holidays = Holiday::forTenant($tenantId)->forYear($year)->get();
+
+        $totalDays = $holidays->sum(function ($h) {
+            return $h->start_date->diffInDays($h->end_date) + 1;
+        });
+
+        return [
+            'total_count' => $holidays->count(),
+            'total_holiday_days' => $totalDays,
+            'public_holiday_count' => $holidays->where('type', 'public_holiday')->count(),
+        ];
+    }
+
+    /**
+     * 단건 조회
+     */
+    public function show(int $id): array
+    {
+        $h = Holiday::forTenant($this->tenantId())->findOrFail($id);
+
+        return [
+            'id' => $h->id,
+            'name' => $h->name,
+            'type' => $h->type,
+            'start_date' => $h->start_date->format('Y-m-d'),
+            'end_date' => $h->end_date->format('Y-m-d'),
+            'days' => $h->start_date->diffInDays($h->end_date) + 1,
+            'is_recurring' => $h->is_recurring,
+            'memo' => $h->memo,
+            'created_at' => $h->created_at?->toIso8601String(),
+            'updated_at' => $h->updated_at?->toIso8601String(),
+        ];
+    }
+
+    /**
+     * 등록
+     */
+    public function store(array $data): array
+    {
+        $tenantId = $this->tenantId();
+
+        $exists = Holiday::forTenant($tenantId)
+            ->where('start_date', $data['start_date'])
+            ->where('end_date', $data['end_date'])
+            ->where('name', $data['name'])
+            ->exists();
+
+        if ($exists) {
+            throw new HttpException(422, __('error.duplicate'));
+        }
+
+        $holiday = Holiday::create([
+            'tenant_id' => $tenantId,
+            'start_date' => $data['start_date'],
+            'end_date' => $data['end_date'],
+            'name' => $data['name'],
+            'type' => $data['type'] ?? 'public_holiday',
+            'is_recurring' => $data['is_recurring'] ?? false,
+            'memo' => $data['memo'] ?? null,
+            'created_by' => $this->apiUserId(),
+        ]);
+
+        return $this->show($holiday->id);
+    }
+
+    /**
+     * 수정
+     */
+    public function update(int $id, array $data): array
+    {
+        $holiday = Holiday::forTenant($this->tenantId())->findOrFail($id);
+
+        $holiday->update([
+            'start_date' => $data['start_date'],
+            'end_date' => $data['end_date'],
+            'name' => $data['name'],
+            'type' => $data['type'],
+            'is_recurring' => $data['is_recurring'] ?? false,
+            'memo' => $data['memo'] ?? null,
+            'updated_by' => $this->apiUserId(),
+        ]);
+
+        return $this->show($id);
+    }
+
+    /**
+     * 삭제
+     */
+    public function delete(int $id): void
+    {
+        $holiday = Holiday::forTenant($this->tenantId())->findOrFail($id);
+        $holiday->delete();
+    }
+
+    /**
+     * 대량 등록
+     */
+    public function bulkStore(array $schedules): array
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+        $count = 0;
+        $skipped = 0;
+
+        foreach ($schedules as $item) {
+            $exists = Holiday::forTenant($tenantId)
+                ->where('start_date', $item['start_date'])
+                ->where('end_date', $item['end_date'])
+                ->where('name', $item['name'])
+                ->exists();
+
+            if ($exists) {
+                $skipped++;
+
+                continue;
+            }
+
+            Holiday::create([
+                'tenant_id' => $tenantId,
+                'start_date' => $item['start_date'],
+                'end_date' => $item['end_date'],
+                'name' => $item['name'],
+                'type' => $item['type'] ?? 'public_holiday',
+                'is_recurring' => $item['is_recurring'] ?? false,
+                'memo' => $item['memo'] ?? null,
+                'created_by' => $userId,
+            ]);
+            $count++;
+        }
+
+        return [
+            'created' => $count,
+            'skipped' => $skipped,
+        ];
+    }
+}
diff --git a/routes/api/v1/hr.php b/routes/api/v1/hr.php
index 4bcf9cf..0353a7e 100644
--- a/routes/api/v1/hr.php
+++ b/routes/api/v1/hr.php
@@ -16,6 +16,7 @@
 use App\Http\Controllers\Api\V1\ApprovalFormController;
 use App\Http\Controllers\Api\V1\ApprovalLineController;
 use App\Http\Controllers\Api\V1\AttendanceController;
+use App\Http\Controllers\Api\V1\CalendarScheduleController;
 use App\Http\Controllers\Api\V1\Construction\ContractController;
 use App\Http\Controllers\Api\V1\Construction\HandoverReportController;
 use App\Http\Controllers\Api\V1\Construction\StructureReviewController;
@@ -213,3 +214,14 @@
         Route::delete('/{id}', [StructureReviewController::class, 'destroy'])->whereNumber('id')->name('v1.construction.structure-reviews.destroy');
     });
 });
+
+// Calendar Schedule API (달력 일정 관리)
+Route::prefix('calendar-schedules')->group(function () {
+    Route::get('', [CalendarScheduleController::class, 'index'])->name('v1.calendar-schedules.index');
+    Route::get('/stats', [CalendarScheduleController::class, 'stats'])->name('v1.calendar-schedules.stats');
+    Route::post('', [CalendarScheduleController::class, 'store'])->name('v1.calendar-schedules.store');
+    Route::post('/bulk', [CalendarScheduleController::class, 'bulkStore'])->name('v1.calendar-schedules.bulk');
+    Route::get('/{id}', [CalendarScheduleController::class, 'show'])->whereNumber('id')->name('v1.calendar-schedules.show');
+    Route::put('/{id}', [CalendarScheduleController::class, 'update'])->whereNumber('id')->name('v1.calendar-schedules.update');
+    Route::delete('/{id}', [CalendarScheduleController::class, 'destroy'])->whereNumber('id')->name('v1.calendar-schedules.destroy');
+});