diff --git a/backend/main.py b/backend/main.py
index fc206d8..29646bd 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -126,6 +126,16 @@ def enrich_attendance_with_leave(records, db):
         if not r.date:
             continue
 
+        # Rest day detection: roster says the shift rests on this weekday
+        # (e.g. Sunday for S2/S3) but raw status is 'missing'. Don't flag as 缺勤
+        # when the employee wasn't scheduled to work.
+        if (r.status_code or '').lower() == 'missing' and r.shift_code and r.weekday:
+            shift_info = get_shift_schedule_full(r.shift_code, r.weekday)
+            if shift_info is None:
+                r.status_code = 'rest'
+                r.status_text = '休息'
+                continue
+
         if r.date in holidays_by_date:
             h = holidays_by_date[r.date]
             # Check roster: if shift's public_holiday == 'Yes', employee works on holidays
@@ -1106,7 +1116,7 @@ async def attendance_status_texts(
     raw status_text variant (e.g. '異常-遲到39分'). Keeping it server-driven
     so client and server agree on the filter vocabulary.
     """
-    return ['正常', '異常', '缺勤', '公假', '請假']
+    return ['正常', '異常', '缺勤', '公假', '請假', '休息']
 
 @app.get("/api/attendance/stats")
 async def attendance_stats(
@@ -1335,6 +1345,8 @@ async def attendance_records(
                            for tag in ('SL', 'AL', 'CL'))]
         elif status_text in ('normal', '正常'):
             rows = [r for r in all_rows if (r.status_code or '').lower() == 'normal']
+        elif status_text in ('rest', '休息'):
+            rows = [r for r in all_rows if (r.status_code or '').lower() == 'rest']
         else:
             # Fallback to raw status_text substring search
             rows = [r for r in all_rows
diff --git a/frontend/src/components/StatusBadge.jsx b/frontend/src/components/StatusBadge.jsx
index 8d3a8b4..2848c1e 100644
--- a/frontend/src/components/StatusBadge.jsx
+++ b/frontend/src/components/StatusBadge.jsx
@@ -1,4 +1,4 @@
-import { CheckCircle, AlertCircle, CalendarX, Palmtree, Briefcase } from 'lucide-react'
+import { CheckCircle, AlertCircle, CalendarX, Palmtree, Briefcase, Coffee } from 'lucide-react'
 
 /**
  * Reusable status badge for attendance records.
@@ -74,6 +74,11 @@ export default function StatusBadge({ code = '', text = '', size = 'sm' }) {
     return wrap(badge(<CalendarX size={12} />, '缺勤', 'bg-gray-200 text-gray-700'))
   }
 
+  // 休息 (rest day — roster says not scheduled, employee didn't clock in)
+  if (c === 'rest' || t === '休息') {
+    return wrap(badge(<Coffee size={12} />, '休息', 'bg-slate-100 text-slate-600'))
+  }
+
   // 公假 (holiday)
   if (c === 'holiday' || t.includes('公假') || t.includes('🏖️')) {
     return wrap(badge(<Palmtree size={12} />, '公假', 'bg-indigo-100 text-indigo-700'))
diff --git a/frontend/src/pages/attendance/List.jsx b/frontend/src/pages/attendance/List.jsx
index eac8988..93f5d7e 100644
--- a/frontend/src/pages/attendance/List.jsx
+++ b/frontend/src/pages/attendance/List.jsx
@@ -99,6 +99,7 @@ export default function AttendanceList() {
       return 'bg-orange-50 hover:bg-orange-100'
     }
     if (c === 'missing') return 'bg-gray-100 hover:bg-gray-200'
+    if (c === 'rest') return 'bg-slate-50 hover:bg-slate-100'
     if (c === 'holiday') return 'bg-indigo-50 hover:bg-indigo-100'
     if (['al', 'sl', 'cl', 'mixed_leave'].includes(c)) return 'bg-violet-50 hover:bg-violet-100'
     return 'hover:bg-slate-50'