diff --git a/src/features/online-board/components/BoardDetailsHeader/LastUpdate.test.tsx b/src/features/online-board/components/BoardDetailsHeader/LastUpdate.test.tsx
new file mode 100644
index 00000000..d6527618
--- /dev/null
+++ b/src/features/online-board/components/BoardDetailsHeader/LastUpdate.test.tsx
@@ -0,0 +1,90 @@
+// @vitest-environment jsdom
+import { describe, it, expect, vi } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { LastUpdate } from "./LastUpdate.js";
+import type { ISimpleFlight, IFlightLeg } from "../../types.js";
+
+vi.mock("@/i18n/provider.js", () => ({ useTranslation: () => ({ t: (k: string) => k }) }));
+
+function makeLeg(updated: string): IFlightLeg {
+  return {
+    arrival: {
+      scheduled: { airport: "", airportCode: "LED", city: "", cityCode: "", countryCode: "" },
+      latest: { airport: "", airportCode: "LED", city: "", cityCode: "", countryCode: "" },
+      dispatch: "",
+      gate: "",
+      terminal: "",
+      times: {
+        scheduledArrival: {
+          dayChange: { value: 0, title: "" },
+          local: "",
+          localTime: "",
+          tzOffset: 0,
+          utc: "",
+        },
+      },
+    },
+    dayChange: 0,
+    departure: {
+      scheduled: { airport: "", airportCode: "SVO", city: "", cityCode: "", countryCode: "" },
+      latest: { airport: "", airportCode: "SVO", city: "", cityCode: "", countryCode: "" },
+      dispatch: "",
+      gate: "",
+      terminal: "",
+      checkingStatus: "Scheduled",
+      parkingStand: "",
+      times: {
+        scheduledDeparture: {
+          dayChange: { value: 0, title: "" },
+          local: "",
+          localTime: "",
+          tzOffset: 0,
+          utc: "2026-04-20T10:00:00Z",
+        },
+      },
+    },
+    equipment: {},
+    flags: { checkinAvailable: false, returnToAirport: false, routeChanged: false },
+    flyingTime: "1h",
+    index: 0,
+    operatingBy: {},
+    status: "Scheduled",
+    updated,
+  } as IFlightLeg;
+}
+
+function makeFlight(updated: string): ISimpleFlight {
+  return {
+    id: "X",
+    routeType: "Direct",
+    flyingTime: "1h",
+    status: "Scheduled",
+    flightId: { carrier: "SU", flightNumber: "0022", suffix: "", date: "20260417" },
+    operatingBy: { carrier: "SU", flightNumber: "0022" },
+    leg: makeLeg(updated),
+  } as ISimpleFlight;
+}
+
+describe("LastUpdate", () => {
+  it("renders LAST-UPDATE label", () => {
+    render(<LastUpdate flight={makeFlight("2026-04-20T12:34:00Z")} locale="ru" />);
+    expect(screen.getByText(/SHARED\.LAST-UPDATE/)).toBeTruthy();
+  });
+
+  it("renders timestamp in HH:mm dd.MM.yyyy format", () => {
+    render(<LastUpdate flight={makeFlight("2026-04-20T12:34:00Z")} locale="ru" />);
+    const ts = screen.getByTestId("last-update-timestamp");
+    expect(ts.textContent).toMatch(/\d{2}:\d{2}\s+\d{2}\.\d{2}\.\d{4}/);
+  });
+
+  it("renders empty timestamp when leg.updated is empty", () => {
+    render(<LastUpdate flight={makeFlight("")} locale="ru" />);
+    const ts = screen.getByTestId("last-update-timestamp");
+    expect(ts.textContent?.trim()).toBe("");
+  });
+
+  it("renders share button", () => {
+    render(<LastUpdate flight={makeFlight("2026-04-20T12:34:00Z")} locale="ru" />);
+    expect(screen.getByTestId("share-button")).toBeTruthy();
+  });
+});
diff --git a/src/features/online-board/components/BoardDetailsHeader/LastUpdate.tsx b/src/features/online-board/components/BoardDetailsHeader/LastUpdate.tsx
new file mode 100644
index 00000000..e08b58ec
--- /dev/null
+++ b/src/features/online-board/components/BoardDetailsHeader/LastUpdate.tsx
@@ -0,0 +1,40 @@
+import type { FC } from "react";
+import { parseISO, format, isValid } from "date-fns";
+import { useTranslation } from "@/i18n/provider.js";
+import type { ISimpleFlight } from "../../types.js";
+import { ShareButton } from "./ShareButton.js";
+
+export interface LastUpdateProps {
+  flight: ISimpleFlight;
+  locale: string;
+}
+
+function getUpdated(flight: ISimpleFlight): string | undefined {
+  const leg = flight.routeType === "Direct" ? flight.leg : flight.legs[0];
+  return leg?.updated;
+}
+
+function formatUpdated(updated: string | undefined): string {
+  if (!updated) return "";
+  const d = parseISO(updated);
+  if (!isValid(d)) return "";
+  return format(d, "HH:mm dd.MM.yyyy");
+}
+
+export const LastUpdate: FC<LastUpdateProps> = ({ flight, locale }) => {
+  const { t } = useTranslation();
+  const timestamp = formatUpdated(getUpdated(flight));
+  const shareUrl = typeof window !== "undefined" ? window.location.href : "";
+
+  return (
+    <div className="last-update">
+      <ShareButton url={shareUrl} locale={locale} />
+      <span className="last-update__description">
+        <span>{t("SHARED.LAST-UPDATE")}:</span>
+        <span className="last-update__time" data-testid="last-update-timestamp">
+          &nbsp;{timestamp}
+        </span>
+      </span>
+    </div>
+  );
+};