diff --git a/server/src/restaurants.ts b/server/src/restaurants.ts
index 7cae72e..6680012 100644
--- a/server/src/restaurants.ts
+++ b/server/src/restaurants.ts
@@ -4,6 +4,10 @@ import { getMenuSladovnickaMock, getMenuTechTowerMock, getMenuUMotlikuMock, getM
 import { formatDate } from "./utils";
 import { Food } from "../../types/gen/types.gen";
 
+export class StaleWeekError extends Error {
+    constructor(public food: Food[][]) { super('Data jsou z jiného týdne'); }
+}
+
 // Fráze v názvech jídel, které naznačují že se jedná o polévku
 const SOUP_NAMES = [
     'polévka',
@@ -299,7 +303,6 @@ export const getMenuTechTower = async (firstDayOfWeek: Date, mock: boolean = fal
     }
 
     const result: Food[][] = [];
-    // TODO validovat, že v textu nalezeného <font> je rozsah, do kterého spadá vstupní datum
     const siblings = secondTry ? $(font).parent().parent().parent().siblings('p') : $(font).parent().parent().siblings();
     let parsing = false;
     let currentDayIndex = 0;
@@ -345,6 +348,18 @@ export const getMenuTechTower = async (firstDayOfWeek: Date, mock: boolean = fal
             })
         }
     }
+
+    // Validace, zda text hlavičky obsahuje datum odpovídající požadovanému týdnu
+    const headerText = $(font).text().trim();
+    const dateMatch = headerText.match(/(\d{1,2})\.(\d{1,2})\./);
+    if (dateMatch) {
+        const foundDay = parseInt(dateMatch[1]);
+        const foundMonth = parseInt(dateMatch[2]) - 1; // JS months are 0-based
+        if (foundDay !== firstDayOfWeek.getDate() || foundMonth !== firstDayOfWeek.getMonth()) {
+            throw new StaleWeekError(result);
+        }
+    }
+
     return result;
 }
 
diff --git a/server/src/service.ts b/server/src/service.ts
index ff6780b..2c02c81 100644
--- a/server/src/service.ts
+++ b/server/src/service.ts
@@ -1,6 +1,6 @@
 import { InsufficientPermissions, PizzaDayConflictError, formatDate, getDayOfWeekIndex, getFirstWorkDayOfWeek, getHumanDate, getIsWeekend, getWeekNumber } from "./utils";
 import getStorage from "./storage";
-import { getMenuSladovnicka, getMenuTechTower, getMenuZastavkaUmichala, getMenuSenkSerikova } from "./restaurants";
+import { getMenuSladovnicka, getMenuTechTower, getMenuZastavkaUmichala, getMenuSenkSerikova, StaleWeekError } from "./restaurants";
 import { getTodayMock } from "./mock";
 import { removeAllUserPizzas } from "./pizza";
 import { ClientData, DepartureTime, LunchChoice, PizzaDayState, Restaurant, RestaurantDayMenu, WeekMenu } from "../../types/gen/types.gen";
@@ -216,6 +216,7 @@ export async function getRestaurantMenu(restaurant: Restaurant, date?: Date, for
             for (let i = 0; i < restaurantWeekFood.length && i < weekMenu.length; i++) {
                 weekMenu[i][restaurant]!.food = restaurantWeekFood[i];
                 weekMenu[i][restaurant]!.lastUpdate = now;
+                weekMenu[i][restaurant]!.isStale = false;
 
                 // Detekce uzavření pro každou restauraci
                 switch (restaurant) {
@@ -245,22 +246,34 @@ export async function getRestaurantMenu(restaurant: Restaurant, date?: Date, for
             // Uložení do storage
             await storage.setData(getMenuKey(usedDate), weekMenu);
         } catch (e: any) {
-            console.error(`Selhalo načtení jídel pro podnik ${restaurant}`, e);
+            if (e instanceof StaleWeekError) {
+                for (let i = 0; i < e.food.length && i < weekMenu.length; i++) {
+                    weekMenu[i][restaurant]!.food = e.food[i];
+                    weekMenu[i][restaurant]!.lastUpdate = now;
+                    weekMenu[i][restaurant]!.isStale = true;
+                }
+                await storage.setData(getMenuKey(usedDate), weekMenu);
+            } else {
+                console.error(`Selhalo načtení jídel pro podnik ${restaurant}`, e);
+            }
         }
     }
     const result = weekMenu[dayOfWeekIndex][restaurant]!;
-    result.warnings = generateMenuWarnings(result, now);
+    result.warnings = generateMenuWarnings(result);
     return result;
 }
 
 /**
  * Generuje varování o kvalitě/úplnosti dat menu restaurace.
  */
-function generateMenuWarnings(menu: RestaurantDayMenu, now: number): string[] {
+function generateMenuWarnings(menu: RestaurantDayMenu): string[] {
     const warnings: string[] = [];
     if (!menu.food?.length || menu.closed) {
         return warnings;
     }
+    if (menu.isStale) {
+        warnings.push('Data jsou z minulého týdne');
+    }
     const hasSoup = menu.food.some(f => f.isSoup);
     if (!hasSoup) {
         warnings.push('Chybí polévka');
@@ -269,10 +282,6 @@ function generateMenuWarnings(menu: RestaurantDayMenu, now: number): string[] {
     if (missingPrice) {
         warnings.push('U některých jídel chybí cena');
     }
-    const STALE_THRESHOLD_MS = 24 * 60 * 60 * 1000;
-    if (menu.lastUpdate && (now - menu.lastUpdate) > STALE_THRESHOLD_MS) {
-        warnings.push('Data jsou starší než 24 hodin');
-    }
     return warnings;
 }
 
diff --git a/types/schemas/_index.yml b/types/schemas/_index.yml
index 75915d4..7992b6b 100644
--- a/types/schemas/_index.yml
+++ b/types/schemas/_index.yml
@@ -186,6 +186,9 @@ RestaurantDayMenu:
       type: array
       items:
         type: string
+    isStale:
+      description: Příznak, zda data mohou pocházet z jiného týdne
+      type: boolean
 RestaurantDayMenuMap:
   description: Objekt, kde klíčem je podnik ((#Restaurant)) a hodnotou denní menu daného podniku ((#RestaurantDayMenu))
   type: object