diff --git a/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.test.tsx b/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.test.tsx
index 7702488f5bf..e2b1149fdfd 100644
--- a/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.test.tsx
+++ b/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.test.tsx
@@ -915,7 +915,7 @@ describe("UsagePage", () => {
       expect(screen.getByText("UniqueUser (user-unique)")).toBeInTheDocument();
     });
 
-    it("should pass selected userId to aggregated call", async () => {
+    it("should include the current UTC day in global usage", async () => {
       renderWithProviders(<UsagePage {...defaultProps} />);
 
       await waitFor(() => {
@@ -928,6 +928,7 @@ describe("UsagePage", () => {
         expect.any(Date),
         expect.any(Date),
         null,
+        true,
       );
     });
   });
@@ -1020,6 +1021,7 @@ describe("UsagePage", () => {
           expect.any(Date),
           expect.any(Date),
           "user-123",
+          true,
         );
       });
     });
@@ -1133,10 +1135,24 @@ describe("UsagePage", () => {
       });
 
       // Verify first page call
-      expect(mockUserDailyActivityCall).toHaveBeenCalledWith("test-token", expect.any(Date), expect.any(Date), 1, null);
+      expect(mockUserDailyActivityCall).toHaveBeenCalledWith(
+        "test-token",
+        expect.any(Date),
+        expect.any(Date),
+        1,
+        null,
+        true,
+      );
 
       // Verify second page call
-      expect(mockUserDailyActivityCall).toHaveBeenCalledWith("test-token", expect.any(Date), expect.any(Date), 2, null);
+      expect(mockUserDailyActivityCall).toHaveBeenCalledWith(
+        "test-token",
+        expect.any(Date),
+        expect.any(Date),
+        2,
+        null,
+        true,
+      );
     });
   });
 
diff --git a/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.tsx b/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.tsx
index 018dfc84740..a10538bfa3f 100644
--- a/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.tsx
+++ b/ui/litellm-dashboard/src/app/(dashboard)/usage/_components/components/UsagePageView.tsx
@@ -192,7 +192,7 @@ const UsagePage: React.FC<UsagePageProps> = ({ teams, organizations }) => {
     const rangeKey = currentAggregatedRangeKey;
     setAggregatedLoading(true);
 
-    userDailyActivityAggregatedCall(accessToken, startTime, endTime, effectiveUserId)
+    userDailyActivityAggregatedCall(accessToken, startTime, endTime, effectiveUserId, true)
       .then((data) => {
         if (aggregatedFetchIdRef.current !== fetchId) return;
         setAggregatedData({ rangeKey, value: data });
@@ -237,7 +237,7 @@ const UsagePage: React.FC<UsagePageProps> = ({ teams, organizations }) => {
   // Paginated fallback — only enabled when aggregated endpoint fails
   const paginatedResult = usePaginatedDailyActivity({
     fetchFn: userDailyActivityCall,
-    args: [accessToken, startTime, endTime, effectiveUserId],
+    args: [accessToken, startTime, endTime, effectiveUserId, true],
     enabled: aggregatedFailed && !!accessToken && !!startTime && !!endTime,
   });
 
diff --git a/ui/litellm-dashboard/src/components/networking.test.ts b/ui/litellm-dashboard/src/components/networking.test.ts
index b964231804e..f64823ab2d6 100644
--- a/ui/litellm-dashboard/src/components/networking.test.ts
+++ b/ui/litellm-dashboard/src/components/networking.test.ts
@@ -776,11 +776,12 @@ describe("daily activity api_key filter", () => {
   const originalFetch = global.fetch;
 
   const captureFetch = () => {
-    const mockFetch = vi.fn<typeof fetch>().mockResolvedValue(
-      new Response(JSON.stringify({ results: [], metadata: {} }), {
-        status: 200,
-        headers: { "Content-Type": "application/json" },
-      }),
+    const mockFetch = vi.fn<typeof fetch>().mockImplementation(
+      async () =>
+        new Response(JSON.stringify({ results: [], metadata: {} }), {
+          status: 200,
+          headers: { "Content-Type": "application/json" },
+        }),
     );
     global.fetch = mockFetch;
     return mockFetch;
@@ -795,6 +796,24 @@ describe("daily activity api_key filter", () => {
     global.fetch = originalFetch;
   });
 
+  it.each([false, true])(
+    "serializes the current UTC day opt-in (%s) on both user activity routes",
+    async (includeCurrentUtcDay) => {
+      const mockFetch = captureFetch();
+
+      await Networking.userDailyActivityCall("sk-key", start, end, 1, "user-123", includeCurrentUtcDay);
+      await Networking.userDailyActivityAggregatedCall("sk-key", start, end, "user-123", includeCurrentUtcDay);
+
+      expect(mockFetch).toHaveBeenCalledTimes(2);
+      for (const [input] of mockFetch.mock.calls) {
+        const url = new URL(String(input), "http://localhost");
+        expect(url.searchParams.get("include_current_utc_day")).toBe(includeCurrentUtcDay ? "true" : null);
+        expect(url.searchParams.get("user_id")).toBe("user-123");
+        expect(url.searchParams.get("timezone")).toBe(String(new Date().getTimezoneOffset()));
+      }
+    },
+  );
+
   it("sends the key hash as api_key from the paginated caller", async () => {
     const mockFetch = captureFetch();