diff --git a/usage-dashboard/usage-dashboard.html b/usage-dashboard/usage-dashboard.html
index 302e1eb..90038bb 100644
--- a/usage-dashboard/usage-dashboard.html
+++ b/usage-dashboard/usage-dashboard.html
@@ -214,6 +214,7 @@
       <option value="5h"    data-i18n="range5h">Last 5 hours</option>
       <option value="24h"   data-i18n="range24h">Last 24 hours</option>
       <option value="7d"    data-i18n="range7d">Last 7 days</option>
+      <option value="30d"   data-i18n="range30d">Last 30 days</option>
     </select>
 
     <button id="quota" class="primary" data-i18n="btnQuota">Refresh Quota</button>
@@ -332,7 +333,7 @@ const STRINGS = {
   en: {
     title: "CLIProxyAPI Usage Dashboard",
     rangeToday:"Today", range1h:"Last 1 hour", range5h:"Last 5 hours",
-    range24h:"Last 24 hours", range7d:"Last 7 days",
+    range24h:"Last 24 hours", range7d:"Last 7 days", range30d:"Last 30 days",
     btnRefresh:"Refresh", btnQuota:"Refresh Quota",
     kpiRequests:"Requests / Tasks", kpiTotal:"Total Tokens",
     kpiTotalSub:"Input + Output + Reasoning", kpiInput:"Input Tokens",
@@ -354,7 +355,7 @@ const STRINGS = {
   vi: {
     title: "Thống Kê Sử Dụng CLIProxyAPI",
     rangeToday:"Hôm nay", range1h:"1 giờ qua", range5h:"5 giờ qua",
-    range24h:"24 giờ qua", range7d:"7 ngày qua",
+    range24h:"24 giờ qua", range7d:"7 ngày qua", range30d:"30 ngày qua",
     btnRefresh:"Làm mới", btnQuota:"Làm mới hạn mức",
     kpiRequests:"Yêu cầu / Tác vụ", kpiTotal:"Tổng Tokens",
     kpiTotalSub:"Đầu vào + Đầu ra + Suy luận", kpiInput:"Tokens đầu vào",
diff --git a/usage-dashboard/usage-dashboard.py b/usage-dashboard/usage-dashboard.py
index 4927826..165b5a4 100644
--- a/usage-dashboard/usage-dashboard.py
+++ b/usage-dashboard/usage-dashboard.py
@@ -568,6 +568,8 @@ def range_bounds(name):
         start = now - dt.timedelta(hours=24)
     elif name == "7d":
         start = now - dt.timedelta(days=7)
+    elif name == "30d":
+        start = now - dt.timedelta(days=30)
     else:
         start = now.replace(hour=0, minute=0, second=0, microsecond=0)
     return start.astimezone(dt.timezone.utc).timestamp(), now.astimezone(dt.timezone.utc).timestamp()
@@ -817,7 +819,7 @@ def main():
     quota_p = sub.add_parser("quota", help="Show current quota snapshots")
     quota_p.add_argument("--force", action="store_true")
     report_p = sub.add_parser("report", help="Print usage summary as JSON")
-    report_p.add_argument("range", choices=["today", "1h", "5h", "24h", "7d"])
+    report_p.add_argument("range", choices=["today", "1h", "5h", "24h", "7d", "30d"])
     args = parser.parse_args()
     if args.cmd == "init":
         init_db()