diff --git a/apps/calendar-macos/CompassKit/Sources/CompassKit/Life/DatePickerCaption.swift b/apps/calendar-macos/CompassKit/Sources/CompassKit/Life/DatePickerCaption.swift
index 405bc2d3b7..2eef42dfc6 100644
--- a/apps/calendar-macos/CompassKit/Sources/CompassKit/Life/DatePickerCaption.swift
+++ b/apps/calendar-macos/CompassKit/Sources/CompassKit/Life/DatePickerCaption.swift
@@ -28,12 +28,6 @@ public enum DatePickerCaption {
         return (start ..< start + yearsPerPage).map { $0 }
     }
 
-    /// Decade-aligned pages (1980–1999 for 1993); legacy sidebar grids.
-    public static func yearPage(containing year: Int) -> [Int] {
-        let start = year - ((year % yearsPerPage) + yearsPerPage) % yearsPerPage
-        return (start ..< start + yearsPerPage).map { $0 }
-    }
-
     public static let monthLabels = [
         "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
     ]
diff --git a/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.test.ts b/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.test.ts
index 46fda33455..dc5752588f 100644
--- a/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.test.ts
+++ b/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.test.ts
@@ -1,5 +1,4 @@
 import {
-  macYearRangeCaption,
   reactDatepickerYearPageBounds,
   shiftYearPageBounds,
   yearRangeCaptionFromBounds,
@@ -33,8 +32,4 @@ describe("caption-picker-year-page", () => {
     expect(shiftYearPageBounds(page, -1)).toEqual({ start: 1961, end: 1980 });
     expect(shiftYearPageBounds(page, 1)).toEqual({ start: 2001, end: 2020 });
   });
-
-  it("keeps mac decade alignment separate", () => {
-    expect(macYearRangeCaption(1993)).toBe("Years 1980 to 1999");
-  });
 });
diff --git a/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.ts b/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.ts
index dabf4a9719..6aea14f809 100644
--- a/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.ts
+++ b/apps/calendar-web/src/components/DatePicker/caption-picker-year-page.ts
@@ -1,4 +1,4 @@
-/** Keep in sync with `DatePickerCaption.reactYearsPerPage` on macOS. */
+/** Keep in sync with `DatePickerCaption.yearsPerPage` on macOS. */
 export const CAPTION_YEARS_PER_PAGE = 20;
 
 export type YearPageBounds = { readonly start: number; readonly end: number };
@@ -30,23 +30,3 @@ export const yearRangeCaptionFromBounds = (bounds: YearPageBounds): string => {
   const { start, end } = bounds;
   return start === end ? `Year ${start}` : `Years ${start} to ${end}`;
 };
-
-/** macOS decade-aligned pages (0, 20, 40, …) for non-react grids. */
-export const macYearPageContaining = (
-  year: number,
-  pageSize = CAPTION_YEARS_PER_PAGE,
-): readonly number[] => {
-  const start = year - (((year % pageSize) + pageSize) % pageSize);
-  return Array.from({ length: pageSize }, (_, index) => start + index);
-};
-
-export const macYearRangeCaption = (
-  anchorYear: number,
-  pageSize = CAPTION_YEARS_PER_PAGE,
-): string => {
-  const page = macYearPageContaining(anchorYear, pageSize);
-  const first = page[0];
-  const last = page[page.length - 1];
-  if (first === undefined || last === undefined) return "Select year";
-  return first === last ? `Year ${first}` : `Years ${first} to ${last}`;
-};
diff --git a/apps/calendar-web/src/views/Life/LifeSidebarContent.tsx b/apps/calendar-web/src/views/Life/LifeSidebarContent.tsx
index 47af1b1c56..1fd0793240 100644
--- a/apps/calendar-web/src/views/Life/LifeSidebarContent.tsx
+++ b/apps/calendar-web/src/views/Life/LifeSidebarContent.tsx
@@ -14,6 +14,10 @@ import { ID_LIFE_BIRTH_DATE } from "@web/common/constants/web.constants";
 import { ArrowButton } from "@web/components/Button/ArrowButton";
 import { NumberInput } from "@web/components/NumberInput/NumberInput";
 import { TooltipWrapper } from "@web/components/Tooltip/TooltipWrapper";
+import {
+  selectPageJumpHintsVisible,
+  usePageJumpHintStore,
+} from "@web/shortcuts/page-jump/page-jump.store";
 import {
   pageJumpAttrs,
   pageJumpChipAttrs,
@@ -46,6 +50,7 @@ export function LifeSidebarContent({
   today,
   onPreferencesChange,
 }: LifeSidebarContentProps) {
+  const pageJumpHintsVisible = usePageJumpHintStore(selectPageJumpHintsVisible);
   const [isBirthDatePickerOpen, setIsBirthDatePickerOpen] = useState(false);
   const [lifespanInput, setLifespanInput] = useState(() =>
     String(preferences.lifespan),
@@ -124,9 +129,14 @@ export function LifeSidebarContent({
                 />
               </TooltipWrapper>
             </div>
-            {/* Portaled Mod chips do not affect layout; reserve space so chip 3
-                sits between the arrows and the title without covering the label. */}
-            <span aria-hidden className="inline-block w-7 shrink-0" />
+            <span
+              aria-hidden
+              className={
+                pageJumpHintsVisible
+                  ? "inline-block w-7 shrink-0"
+                  : "invisible inline-block w-7 shrink-0"
+              }
+            />
             <h2 className="min-w-0 font-semibold text-text">
               {LIFE_VARIATIONS[preferences.variation].label}
             </h2>
diff --git a/apps/calendar-web/src/views/Life/LifeView.test.tsx b/apps/calendar-web/src/views/Life/LifeView.test.tsx
index 7fd3b4981c..7b5437b533 100644
--- a/apps/calendar-web/src/views/Life/LifeView.test.tsx
+++ b/apps/calendar-web/src/views/Life/LifeView.test.tsx
@@ -13,6 +13,7 @@ import { pressKey } from "@web/__tests__/utils/keyboard.test.util";
 import { mockModuleForFile } from "@web/__tests__/utils/mock-module.test.util";
 import { STORAGE_KEYS } from "@web/common/constants/storage.constants";
 import { viewActions } from "@web/events/stores/view.store";
+import { pageJumpHintActions } from "@web/shortcuts/page-jump/page-jump.store";
 import { LifeView } from "./LifeView";
 import {
   afterAll,
@@ -413,6 +414,15 @@ describe("LifeView", () => {
     expect(randomAge).toBeLessThanOrEqual(100);
   });
 
+  it("does not shift the life variation title when Mod page-jump hints appear", async () => {
+    await renderLifeViewWithSidebar();
+    const title = screen.getByRole("heading", { level: 2, name: "Average" });
+    const before = title.getBoundingClientRect().left;
+    act(() => pageJumpHintActions.setHintsVisible(true));
+    expect(title.getBoundingClientRect().left).toBe(before);
+    act(() => pageJumpHintActions.setHintsVisible(false));
+  });
+
   it("cycles life variations with J and K", async () => {
     await renderLifeViewWithSidebar();
     (
diff --git a/e2e/life/caption-year-grid-narrow.spec.ts b/e2e/life/caption-year-grid-narrow.spec.ts
new file mode 100644
index 0000000000..8e1308987b
--- /dev/null
+++ b/e2e/life/caption-year-grid-narrow.spec.ts
@@ -0,0 +1,79 @@
+import { expect, test } from "@playwright/test";
+
+async function openLifeBirthYearGrid(page: import("@playwright/test").Page) {
+  await page.goto("/life", { waitUntil: "domcontentloaded" });
+  await expect(page.getByRole("heading", { name: "Life" })).toBeVisible();
+
+  const openSidebar = page.getByRole("button", { name: "Open sidebar" });
+  if (await openSidebar.isVisible()) {
+    await openSidebar.click();
+  }
+
+  const birth = page.getByRole("textbox", { name: "Date of birth" });
+  await birth.focus();
+  await birth.press("ArrowDown");
+
+  const popper = page.locator(
+    ".react-datepicker-popper:has(.lifeBirthDatePicker)",
+  );
+  await expect(popper).toBeVisible({ timeout: 15000 });
+
+  const caption = popper.getByRole("button", {
+    name: "Choose month and year",
+  });
+  await caption.click();
+
+  await expect(popper.getByText("Years 1981 to 2000")).toBeVisible({
+    timeout: 15000,
+  });
+}
+
+for (const { name, stored } of [
+  { name: "light", stored: "light-beach" },
+  { name: "dark", stored: "dark-abyss" },
+] as const) {
+  test(`life birth date picker year grid fits 360px sidebar (${name})`, async ({
+    page,
+  }) => {
+    await page.addInitScript((theme) => {
+      localStorage.setItem("compass.theme", theme);
+      localStorage.setItem(
+        "compass.onboarding.has-seen-life-view-intro",
+        "true",
+      );
+      localStorage.setItem("compass.view.sidebar-open", "true");
+      localStorage.setItem(
+        "compass.life.preferences",
+        JSON.stringify({
+          birthDate: "1993-09-14",
+          lifespan: 79,
+          variation: "average",
+        }),
+      );
+    }, stored);
+
+    await page.setViewportSize({ width: 360, height: 720 });
+    await openLifeBirthYearGrid(page);
+
+    const popper = page.locator(
+      ".react-datepicker-popper:has(.lifeBirthDatePicker)",
+    );
+
+    await expect(popper.locator(".react-datepicker__year-text")).toHaveCount(
+      20,
+    );
+    const years = await popper
+      .locator(".react-datepicker__year-text")
+      .allTextContents();
+    expect(years.map((y) => Number.parseInt(y.trim(), 10))).toEqual(
+      expect.arrayContaining([1981, 2000]),
+    );
+
+    const withinViewport = await popper.evaluate((el) => {
+      const b = el.getBoundingClientRect();
+      return b.left >= 0 && b.right <= window.innerWidth;
+    });
+    expect(withinViewport).toBe(true);
+    await expect(popper.getByText("Years 1981 to 2000")).toBeVisible();
+  });
+}