diff --git a/package-lock.json b/package-lock.json
index 05efe3c..48b2bd2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
         "ejs": "^3.1.9",
         "express": "^4.18.2",
         "moment": "^2.29.4",
+        "node-cron": "^3.0.2",
         "webuntis": "^2.0.3"
       }
     },
@@ -675,6 +676,17 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/node-cron": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/node-cron/-/node-cron-3.0.2.tgz",
+      "integrity": "sha512-iP8l0yGlNpE0e6q1o185yOApANRe47UPbLf4YxfbiNHt/RU5eBcGB/e0oudruheSf+LQeDMezqC5BVAb5wwRcQ==",
+      "dependencies": {
+        "uuid": "8.3.2"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.12.3",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.3.tgz",
@@ -919,6 +931,14 @@
         "node": ">= 0.4.0"
       }
     },
+    "node_modules/uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
@@ -1440,6 +1460,14 @@
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
       "integrity": "sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg=="
     },
+    "node-cron": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/node-cron/-/node-cron-3.0.2.tgz",
+      "integrity": "sha512-iP8l0yGlNpE0e6q1o185yOApANRe47UPbLf4YxfbiNHt/RU5eBcGB/e0oudruheSf+LQeDMezqC5BVAb5wwRcQ==",
+      "requires": {
+        "uuid": "8.3.2"
+      }
+    },
     "object-inspect": {
       "version": "1.12.3",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.3.tgz",
@@ -1618,6 +1646,11 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA=="
     },
+    "uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
diff --git a/package.json b/package.json
index 1bad4e8..ee1aadf 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
     "ejs": "^3.1.9",
     "express": "^4.18.2",
     "moment": "^2.29.4",
+    "node-cron": "^3.0.2",
     "webuntis": "^2.0.3"
   }
 }
diff --git a/src/server.js b/src/server.js
index 1d7d48f..636e6de 100644
--- a/src/server.js
+++ b/src/server.js
@@ -4,6 +4,7 @@ const app = express();
 const { spawnSync } = require('child_process');
 const moment = require('moment');
 const { WebUntis } = require('webuntis');
+var cron = require('node-cron');
 
 // Befehl für die Skriptausführung
 const command = process.platform === 'win32' ? 'python' : 'python3';
@@ -15,21 +16,26 @@ const static = path.join(__dirname, 'static');
 // Verwende EJS als Vorlagen-Engine
 app.set('view engine', 'ejs');
 
-// Funktion zum Erstellen der Liste der letzten 50 Wochen
-function getLast50Weeks() {
+function getlast50weeks() {
     let currentWeek = moment().startOf('isoWeek');
-    const last50Weeks = [];
-    
+    let last50WeeksCache = [];
+
     for (let i = 0; i < 50; i++) {
         const startOfWeek = currentWeek.clone().format('DD.MM.YYYY');
         const endOfWeek = currentWeek.clone().add(6, 'days').format('DD.MM.YYYY');
-        last50Weeks.push(startOfWeek + " - " + endOfWeek);
+        last50WeeksCache.push(startOfWeek + " - " + endOfWeek);
         currentWeek.subtract(7, 'days');
     }
     
-    return last50Weeks;
+    return last50WeeksCache;
 }
 
+let last50Weeks = getlast50weeks();
+
+cron.schedule('0 6 * * *', () => {
+    last50Weeks = getlast50weeks();
+});
+
 function getCalendarEntries(weekDate) {
     const [startDateStr, endDateStr] = weekDate.split(" - ");
     
@@ -131,12 +137,16 @@ app.use("/", express.static(static));
 
 // Definiere eine Route für die Startseite
 app.get('/', (req, res) => {
-    res.render(path.join(static, 'index'), { options:getLast50Weeks() });
+    res.render(path.join(static, 'index'), {options:last50Weeks });
+});
+
+app.get('/getlast50weeks', (req, res) => {
+    res.send(last50Weeks);
 });
 
 // Definiere eine Route für die Ausgabe der Daten
 app.get('/getreport', async (req, res) => {
-    const weekDate = getLast50Weeks()[req.query.week];
+    const weekDate = last50Weeks[req.query.week];
     res.send({
         calendar: getCalendarEntries(weekDate),
         untis: await getUntis(weekDate)