diff --git a/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.test.tsx b/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.test.tsx
index b04e522321..a5d83c0ca6 100644
--- a/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.test.tsx
+++ b/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.test.tsx
@@ -1,8 +1,17 @@
 import userEvent from "@testing-library/user-event";
-import { EventIdSchema } from "@core/types/domain-primitives";
+import {
+  type Calendar,
+  getCalendarCapabilities,
+} from "@core/types/calendar.contracts";
+import {
+  CalendarIdSchema,
+  EventIdSchema,
+  TimeZoneSchema,
+} from "@core/types/domain-primitives";
 import { type Event, EventScheduleSchema } from "@core/types/event.contracts";
 import dayjs from "@core/util/date/dayjs";
 import {
+  act,
   cleanup,
   fireEvent,
   render,
@@ -10,6 +19,9 @@ import {
   waitFor,
 } from "@web/__tests__/__mocks__/mock.render";
 import { createMockEvent } from "@web/__tests__/utils/factories/event.factory";
+import { createCompassQueryClient } from "@web/api/query-client";
+import { calendarQueryKeys } from "@web/calendars/calendar.query";
+import { setCalendarVisibility } from "@web/calendars/calendar-visibility.store";
 import { draftActions, useDraftStore } from "@web/events/stores/draft.store";
 import { formatStartsIn, UpNextCard } from "./UpNextCard";
 import { useUpNextEventShortcut } from "./useUpNextEvent";
@@ -18,6 +30,21 @@ import "@testing-library/jest-dom";
 
 const SOON_EVENT_ID = "aaaaaaaaaaaaaaaaaaaaaaaa";
 const LATER_EVENT_ID = "bbbbbbbbbbbbbbbbbbbbbbbb";
+const CALENDAR_ID = CalendarIdSchema.parse("cccccccccccccccccccccccc");
+const CALENDAR: Calendar = {
+  id: CALENDAR_ID,
+  name: "Work",
+  description: "",
+  timeZone: TimeZoneSchema.parse("America/Denver"),
+  foregroundColor: "#000000",
+  backgroundColor: "#3b82f6",
+  provider: "google",
+  access: "owner",
+  capabilities: getCalendarCapabilities("owner"),
+  isPrimary: false,
+  isVisible: true,
+  isActive: true,
+};
 
 // Events are built relative to the real clock because the card's whole job is
 // comparing today's events against "now".
@@ -84,7 +111,7 @@ describe("UpNextCard", () => {
     expect(screen.getByText("N")).toBeInTheDocument();
   });
 
-  it("renders nothing when today has no upcoming timed events", () => {
+  it("keeps its slot with an all-clear state when today has no upcoming timed events", () => {
     render(<UpNextCard />, {
       events: [
         // Already underway, so nothing is "up next".
@@ -101,12 +128,48 @@ describe("UpNextCard", () => {
       ],
     });
 
-    expect(screen.queryByRole("region", { name: "Up next" })).toBeNull();
-    expect(
-      screen.queryByText("Nothing scheduled — press C to add an event."),
-    ).toBeNull();
+    expect(screen.getByRole("region", { name: "Up next" })).toBeInTheDocument();
+    expect(screen.getByText("All clear")).toBeInTheDocument();
     expect(screen.queryByText("Past Event")).toBeNull();
     expect(screen.queryByText("All Day Event")).toBeNull();
+    expect(screen.queryByRole("button", { name: /up next:/i })).toBeNull();
+  });
+
+  it("keeps its card while hiding the calendar with the only upcoming event", async () => {
+    const queryClient = createCompassQueryClient();
+    queryClient.setQueryData(calendarQueryKeys.all, [CALENDAR]);
+
+    render(<UpNextCard />, {
+      events: [
+        createMockEvent({
+          id: EventIdSchema.parse(SOON_EVENT_ID),
+          calendarId: CALENDAR_ID,
+          content: { kind: "details", title: "Soon Event", description: "" },
+          schedule: EventScheduleSchema.parse({
+            kind: "timed",
+            start: dayjs().add(30, "minute").format(),
+            end: dayjs().add(60, "minute").format(),
+            timeZone: "UTC",
+          }),
+        }),
+      ],
+      queryClient,
+    });
+
+    expect(
+      screen.getByRole("button", { name: /up next: soon event/i }),
+    ).toBeInTheDocument();
+
+    act(() => {
+      expect(setCalendarVisibility(CALENDAR_ID, false)).toBe(true);
+    });
+
+    await waitFor(() => {
+      expect(
+        screen.getByRole("region", { name: "Up next" }),
+      ).toBeInTheDocument();
+      expect(screen.getByText("All clear")).toBeInTheDocument();
+    });
   });
 
   it("opens the event's details in the sidebar when clicked", async () => {
diff --git a/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.tsx b/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.tsx
index 47771e198d..bd1971e4d7 100644
--- a/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.tsx
+++ b/packages/web/src/components/Sidebar/UpNextCard/UpNextCard.tsx
@@ -29,29 +29,32 @@ export function formatStartsIn(start: Dayjs, now: Dayjs): string {
  */
 export const UpNextCard: FC = () => {
   const { now, openEventDetails, upNext } = useUpNextEvent();
-
-  if (!upNext) {
-    return null;
-  }
-
-  const countdown = formatStartsIn(dayjs(upNext.startDate), now);
+  const countdown = upNext
+    ? formatStartsIn(dayjs(upNext.startDate), now)
+    : undefined;
 
   return (
     <section aria-label="Up next">
-      <button
-        aria-label={`Up next: ${upNext.title}. ${countdown}.`}
-        className="c-focus-ring group relative flex w-full min-w-0 flex-col gap-0.5 rounded border border-border bg-surface px-2 py-1.5 text-left hover:brightness-110"
-        onClick={() => openEventDetails("gridClick")}
-        type="button"
-      >
-        <span className="pr-8 text-accent text-xs">{countdown}</span>
-        <ShortcutHint className="absolute top-2 right-2 opacity-0 transition-opacity group-hover:opacity-100 group-focus-visible:opacity-100">
-          N
-        </ShortcutHint>
-        <span className="min-w-0 truncate font-medium text-sm text-text">
-          {upNext.title}
-        </span>
-      </button>
+      {upNext ? (
+        <button
+          aria-label={`Up next: ${upNext.title}. ${countdown}.`}
+          className="c-focus-ring group relative flex min-h-14 w-full min-w-0 flex-col gap-0.5 rounded border border-border bg-surface px-2 py-1.5 text-left hover:brightness-110"
+          onClick={() => openEventDetails("gridClick")}
+          type="button"
+        >
+          <span className="pr-8 text-accent text-xs">{countdown}</span>
+          <ShortcutHint className="absolute top-2 right-2 opacity-0 transition-opacity group-hover:opacity-100 group-focus-visible:opacity-100">
+            N
+          </ShortcutHint>
+          <span className="min-w-0 truncate font-medium text-sm text-text">
+            {upNext.title}
+          </span>
+        </button>
+      ) : (
+        <p className="flex min-h-14 items-center rounded border border-border bg-surface px-2 py-1.5 font-medium text-sm text-text-muted">
+          All clear
+        </p>
+      )}
     </section>
   );
 };