diff --git a/components/charts/tracker-analytics.tsx b/components/charts/tracker-analytics.tsx
index d204b4b..097a48b 100644
--- a/components/charts/tracker-analytics.tsx
+++ b/components/charts/tracker-analytics.tsx
@@ -418,7 +418,11 @@ function BreakdownPanel({
           <RankRows data={rows} total={total} />
         </div>
       ) : (
-        <EmptyRange message="No data in this timeframe." range={range} />
+        <EmptyRange
+          message="No data in this timeframe."
+          range={range}
+          ranges={ranges}
+        />
       )}
     </PanelFrame>
   );
@@ -502,7 +506,7 @@ function RankedPanel({
           <RankRows data={rows} total={total} />
         </>
       ) : (
-        <EmptyRange message={empty} range={range} />
+        <EmptyRange message={empty} range={range} ranges={ranges} />
       )}
     </PanelFrame>
   );
@@ -513,16 +517,20 @@ function RankedPanel({
 function EmptyRange({
   message,
   range,
+  ranges,
 }: {
   message: string;
   range: TrackerRangeKey;
+  ranges?: TrackerRange[];
 }) {
+  // Describe the range from the panel's own list, not the global table: the
+  // rollup-only panels relabel 1D as today's UTC day, and the global lookup
+  // would name a rolling 24h window they never queried.
+  const described = ranges?.find((r) => r.key === range) ?? trackerRange(range);
   return (
     <p className="text-sm text-[var(--color-muted)]">
       {message}{" "}
-      <span className="text-xs">
-        ({trackerRange(range).description.toLowerCase()})
-      </span>
+      <span className="text-xs">({described.description.toLowerCase()})</span>
     </p>
   );
 }
diff --git a/lib/tracker/panels.ts b/lib/tracker/panels.ts
index 94239c5..26b6b7a 100644
--- a/lib/tracker/panels.ts
+++ b/lib/tracker/panels.ts
@@ -93,6 +93,18 @@ export async function resolveDays(
   return Math.min(Math.max(spanDays, 1), MAX_ALL_DAYS);
 }
 
+// The four rollup-only panels (exit pages, devices, browsers, operating
+// systems) offer the "1D" tab, but that range is defined with `minutes`, not
+// `days` — it is a raw-event window for every other panel. Handing it to
+// resolveDays finds no `days`, falls through to tracker_first_day and returns
+// the project's entire history, so the 1D tab rendered All-time totals: on a
+// site younger than 30 days, 1D, 1M and All were the same number. A sub-day
+// window against a day-resolution rollup is one day — today's UTC rollup —
+// which is exactly what ROLLUP_ONLY_RANGES already documents it to mean.
+export function rollupDays(range: TrackerRange, days: number): number {
+  return isRawRange(range) ? 1 : days;
+}
+
 /** Fetch one panel. Errors surface as an empty panel rather than a broken page. */
 export async function fetchPanel(
   sb: Sb,
@@ -182,7 +194,7 @@ export async function fetchPanel(
       // Rollup-only: tracker_exit_sessions keys on a date, not a timestamp.
       const { data } = await sb.rpc("tracker_top_exit_pages", {
         p_project: projectId,
-        days,
+        days: rollupDays(range, days),
         lim: TOP_N,
       });
       return (
@@ -300,7 +312,7 @@ export async function fetchPanel(
       // device_type / browser / os columns.
       const { data } = await sb.rpc("tracker_device_totals", {
         p_project: projectId,
-        days,
+        days: rollupDays(range, days),
       });
       const rows = (
         (data ?? []) as Array<{
diff --git a/lib/tracker/ranges.ts b/lib/tracker/ranges.ts
index 4e6c226..1d28740 100644
--- a/lib/tracker/ranges.ts
+++ b/lib/tracker/ranges.ts
@@ -91,8 +91,16 @@ export const PANEL_RANGE_KEYS: Record<string, TrackerRangeKey[]> = {
   exitPages: ROLLUP_ONLY_RANGES,
 };
 
+// These panels answer "1D" from today's UTC rollup, so the shared description
+// ("Last 24 hours") would promise a rolling window they cannot serve. Relabel
+// it here, where the list is already being narrowed, so the tab tooltip
+// describes the number the panel actually returns.
+const ROLLUP_1D_DESCRIPTION = "Today so far, UTC day";
+
 export function rangesForPanel(panel: string): TrackerRange[] {
   const allowed = PANEL_RANGE_KEYS[panel];
   if (!allowed) return TRACKER_RANGES;
-  return TRACKER_RANGES.filter((r) => allowed.includes(r.key));
+  return TRACKER_RANGES.filter((r) => allowed.includes(r.key)).map((r) =>
+    r.key === "1d" ? { ...r, description: ROLLUP_1D_DESCRIPTION } : r,
+  );
 }
diff --git a/tests/tracker-rollup-ranges.test.ts b/tests/tracker-rollup-ranges.test.ts
new file mode 100644
index 0000000..dde1818
--- /dev/null
+++ b/tests/tracker-rollup-ranges.test.ts
@@ -0,0 +1,95 @@
+import { describe, expect, it } from "vitest";
+import { fetchPanel, rollupDays } from "@/lib/tracker/panels";
+import {
+  PANEL_RANGE_KEYS,
+  ROLLUP_ONLY_RANGES,
+  rangesForPanel,
+  trackerRange,
+} from "@/lib/tracker/ranges";
+
+// The "1D" tab is a raw-event range (minutes, no days) for most panels, but the
+// four rollup-only panels accept it too. Before this was pinned, those panels
+// resolved it to the project's whole history, so 1D and All returned the same
+// number and nobody could tell a spike from a total.
+
+// Records the arguments each RPC is called with; every rollup RPC here returns
+// an empty list, which is enough since we assert on the call, not the payload.
+function spySb() {
+  const calls: Array<{ fn: string; args: Record<string, unknown> }> = [];
+  return {
+    calls,
+    rpc(fn: string, args: Record<string, unknown>) {
+      calls.push({ fn, args });
+      return Promise.resolve({ data: [], error: null });
+    },
+  };
+}
+
+describe("rollupDays", () => {
+  it("collapses a sub-day range to a single rollup day", () => {
+    expect(rollupDays(trackerRange("1d"), 999)).toBe(1);
+    expect(rollupDays(trackerRange("1h"), 999)).toBe(1);
+  });
+
+  it("passes rollup ranges through untouched", () => {
+    expect(rollupDays(trackerRange("1w"), 7)).toBe(7);
+    expect(rollupDays(trackerRange("1m"), 30)).toBe(30);
+    // "All" resolves upstream in resolveDays; whatever it computed survives.
+    expect(rollupDays(trackerRange("all"), 412)).toBe(412);
+  });
+});
+
+describe("rollup-only panels at the 1D tab", () => {
+  const rollupOnly = Object.keys(PANEL_RANGE_KEYS);
+
+  it("offers 1D on every rollup-only panel", () => {
+    expect(rollupOnly.length).toBeGreaterThan(0);
+    for (const panel of rollupOnly) {
+      expect(PANEL_RANGE_KEYS[panel]).toContain("1d");
+    }
+    expect(ROLLUP_ONLY_RANGES).toContain("1d");
+  });
+
+  it("asks for one day, not the resolved history span", async () => {
+    for (const panel of rollupOnly) {
+      const sb = spySb();
+      // 412 is what resolveDays hands back for a raw range today: the whole
+      // project history. The panel must not use it.
+      await fetchPanel(sb as never, "p1", panel as never, trackerRange("1d"), 412);
+      expect(sb.calls).toHaveLength(1);
+      expect(sb.calls[0].args.days, `${panel} at 1D`).toBe(1);
+    }
+  });
+
+  it("still honours a real rollup range", async () => {
+    for (const panel of rollupOnly) {
+      const sb = spySb();
+      await fetchPanel(sb as never, "p1", panel as never, trackerRange("1m"), 30);
+      expect(sb.calls[0].args.days, `${panel} at 1M`).toBe(30);
+    }
+  });
+
+  it("labels the 1D tab as the UTC day it actually reads", () => {
+    for (const panel of rollupOnly) {
+      const ranges = rangesForPanel(panel);
+      expect(ranges).toHaveLength(ROLLUP_ONLY_RANGES.length);
+      expect(
+        ranges.find((r) => r.key === "1d")?.description,
+        `${panel} 1D tooltip`,
+      ).toBe("Today so far, UTC day");
+    }
+  });
+
+  it("leaves the raw-capable panels alone", async () => {
+    expect(rangesForPanel("pages")).toHaveLength(7);
+    expect(rangesForPanel("pages").find((r) => r.key === "1d")?.description).toBe(
+      "Last 24 hours, hourly buckets",
+    );
+    // The top-pages panel keeps its rolling 24h source at 1D — that is why it
+    // reads ~4k for /login while exit pages reads today's rollup.
+    const sb = spySb();
+    await fetchPanel(sb as never, "p1", "pages" as never, trackerRange("1d"), 412);
+    expect(sb.calls[0].fn).toBe("tracker_recent_top_pages");
+    expect(sb.calls[0].args.p_minutes).toBe(1440);
+  });
+});